Terms of Service

These Terms of Service (“Terms”) govern the use of the Sienda Ltd website and the provision of advisory, analytical, business engineering and related professional services by Sienda Ltd (“Sienda”, “we”, “us”, “our”).

By engaging Sienda, commissioning work, accepting a proposal or quotation, purchasing a service or using materials supplied by us, you agree to these Terms.

A particular assignment may also be governed by a proposal, statement of work, engagement letter, invoice, confidentiality agreement or other written terms. Where specific written terms conflict with these general Terms, the specific terms for that assignment will prevail.

1. Company details

Sienda Ltd
Third Floor, 207 Regent St
London W1B 3HH
United Kingdom

Company No. 08194971
Registered in England & Wales

Email: hub@siendaweblines.com
Website: sienda.co.uk

2. Business use

Sienda’s services are primarily intended for businesses, organisations, professionals and other commercial or institutional clients.

Where a person engages Sienda as a consumer and mandatory consumer rights apply, nothing in these Terms is intended to exclude or restrict rights that cannot lawfully be excluded.

3. What Sienda does

Sienda provides independent business engineering and advisory services.

Assignments may include, among other things:

1. Business engineering and organisational analysis.
2. Process, workflow and operating-model review.
3. Commercial and market analysis.
4. Product and project review.
5. Technology advisory.
6. Data and decision analysis.
7. Management and decision support.
8. Expert consultation.
9. Short-term or interim advisory assignments.
10. Research, reports, assessments and analytical materials.
11. Support with business systems relating to standards, regulatory requirements, certification readiness, documentation and internal controls.
12. Training, guidance and supporting business documentation where agreed.

Assignments are accepted selectively and only where Sienda believes that its experience and capabilities can make a useful contribution.

We are not obliged to accept any enquiry or proposed assignment.

4. Nature of our work

Sienda provides independent analysis, professional judgement and practical recommendations based on the circumstances, information and objectives of each assignment.

Our role may include identifying problems, examining evidence, challenging assumptions, evaluating alternatives and helping management understand possible courses of action.

Unless expressly agreed otherwise, our work is advisory.

The client remains responsible for its business decisions, implementation choices and actions taken following our work.

Sienda does not guarantee any particular commercial, operational, financial, regulatory or other outcome.

5. Regulatory, certification and standards-related work

Some business-engineering assignments may involve requirements arising from legislation, standards, certification schemes, privacy and data-protection frameworks, quality systems or other external requirements.

Examples may include areas such as GLOBALG.A.P., ISO standards, privacy and data protection, and requirements arising from the European Union Artificial Intelligence Act.

Unless expressly stated otherwise in writing:

1. Sienda is not acting as a certification body, regulator, supervisory authority or accredited conformity-assessment body.
2. Sienda cannot issue, award, renew or guarantee any certification, accreditation, approval or regulatory outcome.
3. Our work may assist an organisation in understanding requirements, designing procedures, preparing documentation, establishing responsibilities, identifying gaps and improving operational readiness.
4. Final interpretation of legal or regulatory requirements remains the responsibility of the client and, where appropriate, its qualified legal, regulatory or technical advisers.
5. Certification decisions remain exclusively with the relevant certification or conformity-assessment body.

No statement by Sienda should be interpreted as a guarantee that an organisation will obtain certification, pass an audit or be considered compliant by a regulator or competent authority.

6. Professional and specialist advice

Sienda’s work may touch areas involving commercial, technical, regulatory, organisational or legal considerations.

Unless expressly agreed and appropriately qualified, Sienda does not provide legal, tax, accounting, medical, investment or other regulated professional advice.

Where a matter requires a regulated or formally qualified professional opinion, the client is responsible for obtaining that advice.

Sienda may recommend that specialist advice be obtained where appropriate.

7. Engagements and scope

The scope of an assignment may be defined through a proposal, quotation, email, statement of work, meeting record, invoice or other written agreement.

An engagement may specify:

1. Objectives.
2. Scope.
3. Deliverables.
4. Fees.
5. Estimated timescale.
6. Information or access required from the client.
7. Responsibilities of each party.
8. Any particular assumptions or limitations.

Work outside the agreed scope may require a separate quotation or amendment.

We may pause work where additional instructions, information, approval or agreement regarding scope are required.

8. Client responsibilities

The client agrees to provide information that is reasonably accurate, complete and timely.

The client is responsible for:

1. Ensuring that information supplied to Sienda may lawfully be disclosed and used for the assignment.
2. Informing Sienda of material facts that may affect the analysis or conclusions.
3. Providing reasonable access to relevant personnel, documents, systems or information where agreed.
4. Reviewing deliverables and raising material questions or corrections promptly.
5. Making its own final business and management decisions.
6. Obtaining specialist legal, accounting, regulatory, engineering or other advice where required.
7. Implementing any recommendation safely, lawfully and appropriately.

Sienda is not responsible for conclusions affected by information that was inaccurate, incomplete, withheld or unavailable.

9. Fees and payment

Fees are those stated in the relevant proposal, quotation, invoice, engagement document or other written agreement.

Depending on the assignment, Sienda may require:

1. Payment in advance.
2. A deposit.
3. Staged payments.
4. Payment on completion.
5. Periodic invoicing for ongoing work.

Invoices are payable within the period stated on the invoice.

Where no payment period is specified, payment is due within 14 days of the invoice date.

Sienda may suspend work or withhold deliverables where payment is overdue.

The client is responsible for any applicable taxes, duties, bank charges or currency-conversion costs unless otherwise agreed.

10. Cancellation and termination

Cancellation and termination arrangements may be specified in the relevant engagement terms.

Where no specific arrangement has been agreed, either party may terminate an ongoing engagement by written notice.

The client remains responsible for:

1. Work already completed.
2. Time already committed where cancellation occurs at short notice.
3. Expenses already incurred.
4. Third-party commitments made specifically for the assignment.
5. Deliverables already supplied.

Where advance payments have been made, any refund will be assessed according to the amount of work performed and costs already incurred.

Nothing in this section affects mandatory statutory rights where they apply.

11. Timescales

Any timescale or completion date is an estimate unless expressly agreed in writing as a binding deadline.

Delivery may depend on factors including:

1. Client responsiveness.
2. Availability and quality of information.
3. Access to relevant personnel or systems.
4. Third-party services.
5. Changes in scope.
6. External events or dependencies.

Sienda will use reasonable efforts to meet agreed timescales but is not responsible for delays outside its reasonable control.

12. Confidentiality

Each party will keep confidential information received from the other confidential and use it only for purposes connected with the relevant engagement.

Confidential information does not include information that:

1. Is lawfully in the public domain.
2. Was already lawfully known to the receiving party.
3. Is independently developed without access to the confidential information.
4. Is lawfully obtained from another source.
5. Must be disclosed by law, court order or competent authority.

Where a separate confidentiality or non-disclosure agreement applies, that agreement will prevail in the event of conflict.

13. Data protection and privacy

Personal data is handled in accordance with Sienda’s Privacy Policy and applicable data-protection requirements.

Clients should provide only personal data that is reasonably necessary for the assignment.

Where a client provides personal data relating to employees, customers, suppliers, prospects or other third parties, the client is responsible for ensuring that it has an appropriate lawful basis and authority to do so.

Where an engagement requires specific data-processing arrangements, these may be addressed through a separate agreement.

14. Research, data and external information

Sienda may use information supplied by the client together with information obtained from publicly available, commercial, professional or other lawful sources.

Information from third parties may be incomplete, inaccurate, outdated or subsequently changed.

Sienda will use reasonable care in assessing information used in its work but cannot guarantee the accuracy or completeness of information obtained from independent third parties.

Research and analysis represent the circumstances and information reasonably available at the time the work is performed.

15. Technology and analytical tools

Sienda may use appropriate professional, analytical, research, data-processing, automation or artificial-intelligence tools internally where they assist with carrying out an assignment.

Such tools are part of Sienda’s working methods and do not replace Sienda’s responsibility for the professional work delivered to the client.

Unless specifically relevant to the engagement, Sienda is not required to disclose every internal tool, method or system used in producing its work.

Clients remain responsible for reviewing decisions and actions based upon any analysis or recommendation supplied.

16. Intellectual property

Client materials

The client retains ownership of documents, data, information and other materials it provides to Sienda.

The client grants Sienda permission to use those materials to the extent reasonably necessary to perform the engagement.

Sienda materials

Sienda retains ownership of its pre-existing:

• methodologies;
• analytical approaches;
• templates;
• frameworks;
• know-how;
• research methods;
• working practices;
• documentation structures;
• intellectual property;
• proprietary materials.

Deliverables

Unless otherwise agreed in writing, once all applicable fees have been paid, the client may use deliverables specifically prepared for it for its own internal business purposes.

The client may not resell, publish, commercially distribute or represent Sienda materials as its own product without written permission.

Where broader usage or ownership rights are required, these should be agreed as part of the engagement.

17. Third-party services and information

An engagement may involve information, services, databases, platforms, providers, consultants or other third parties.

Sienda is not responsible for the independent acts, omissions, availability, accuracy, pricing, policies or performance of third parties.

Where third-party costs are required specifically for an engagement, responsibility for those costs will be agreed with the client.

18. Conflicts and independence

Sienda seeks to maintain independent professional judgement.

Clients should inform Sienda of any known conflict that could reasonably affect an assignment.

Sienda may decline or terminate an engagement where a material conflict, ethical concern, legal restriction or other circumstance makes continued involvement inappropriate.

Sienda may work with other organisations operating in the same sector unless exclusivity has specifically been agreed in writing.

Confidential information belonging to one client will not be disclosed to another.

19. Warranties

Sienda will perform professional services with reasonable care and skill.

However, unless expressly agreed otherwise, Sienda does not warrant that:

1. Recommendations will produce a particular result.
2. Commercial opportunities will result in sales or contracts.
3. A business decision will achieve a particular financial return.
4. A project will succeed.
5. A certification or regulatory outcome will be obtained.
6. Third-party information will always be accurate or complete.
7. Future market, regulatory, technological or commercial circumstances will correspond with present analysis.

Professional judgement necessarily involves uncertainty, particularly where decisions concern future events.

20. Limitation of liability

Nothing in these Terms excludes or limits liability where doing so would be unlawful, including liability for death or personal injury caused by negligence, fraud or fraudulent misrepresentation.

Subject to that restriction and to the maximum extent permitted by law, Sienda will not be liable for:

1. Indirect or consequential losses.
2. Loss of profit or revenue.
3. Loss of business opportunity.
4. Loss of anticipated savings.
5. Loss of goodwill or reputation.
6. Business interruption.
7. Decisions made by the client following advisory work.
8. Losses caused by inaccurate, incomplete or withheld information supplied by the client or a third party.
9. Changes in markets, regulations, certification requirements, technology or other circumstances occurring after work has been completed.

Unless otherwise agreed in writing, Sienda’s total aggregate liability arising from a particular engagement will not exceed the total fees paid to Sienda for that engagement.

21. Reliance and third parties

Unless expressly agreed otherwise, Sienda’s work is prepared for the client that commissioned it.

Third parties should not rely upon a report, recommendation, assessment or other deliverable without Sienda’s written agreement.

The client may share deliverables internally with persons who reasonably need them for the purposes of the engagement.

22. Force majeure

Sienda will not be liable for delay or failure caused by circumstances beyond its reasonable control.

These may include serious illness, natural disaster, war, civil disturbance, government action, infrastructure failure, communications outage, cyber incident, widespread service disruption or failure of a material third-party provider.

23. Assignment and subcontracting

The client may not transfer its rights or obligations under an engagement without Sienda’s written agreement.

Sienda may use appropriate external specialists, contractors or service providers where reasonably necessary for an assignment, while remaining responsible for managing the work it has agreed to deliver.

24. Website

Information published on sienda.co.uk is provided for general information about Sienda and its activities.

Website content does not constitute an offer, guarantee, professional opinion or advice relating to a particular organisation or circumstance.

Sienda may change, remove or update website content without notice.

Links to external websites are provided for convenience and do not imply responsibility for their content or practices.

25. Changes to these Terms

Sienda may update these Terms from time to time.

The Terms applicable to a particular engagement will normally be those in force when that engagement is agreed unless the parties agree otherwise.

The current version will be published on sienda.co.uk.

26. Severability

If any provision of these Terms is found to be invalid or unenforceable, the remaining provisions will continue in effect.

Any invalid provision will be interpreted or modified to the minimum extent necessary to make it enforceable where legally possible.

27. Entire agreement

These Terms, together with any proposal, quotation, engagement letter, invoice, statement of work or other written terms applying to an assignment, form the agreement between Sienda and the client in relation to that engagement.

Specific written engagement terms will prevail over these general Terms where there is a conflict.

28. Governing law and jurisdiction

These Terms and any engagement with Sienda are governed by the laws of England and Wales.

The courts of England and Wales will have exclusive jurisdiction over disputes arising from or connected with these Terms or Sienda’s services, except where applicable law provides mandatory rights otherwise.

29. Contact

Questions regarding these Terms may be sent to:

Sienda Ltd
Third Floor, 207 Regent St
London W1B 3HH
United Kingdom

Email: hub@siendaweblines.com
Website: sienda.co.uk

Last updated: 9 September 2026