Terms of Service
These general terms apply to the Sienda Ltd website and to advisory, analytical, business-engineering and related professional services unless more specific written terms are agreed for an assignment.
Company details
Sienda Ltd, Third Floor, 207 Regent Street, London W1B 3HH, United Kingdom. Company No. 08194971. Registered in England & Wales.
Business use and selective engagements
Sienda’s services are primarily intended for businesses, organisations and professionals. Enquiries and proposed assignments are considered selectively. Sienda is not obliged to accept an enquiry or proposed engagement.
Nature of the work
Assignments may involve business engineering, organisational or process analysis, commercial and market work, projects and products, technology assessment, data and decision analysis, implementation support, management systems, privacy or compliance implementation, expert consultation and short interim involvement.
Unless expressly agreed otherwise, the work is advisory. The client remains responsible for its final business decisions, implementation choices and actions. No particular commercial, regulatory, operational or financial result is guaranteed.
Regulatory and specialist matters
Work may address practical requirements connected with standards, certification, privacy, management systems or regulation. Sienda is not a regulator, certification body or accredited conformity-assessment body and cannot guarantee certification, audit or regulatory outcomes. Legal, tax, accounting, medical, investment or other regulated professional advice must be obtained from appropriately qualified professionals where required.
Scope, information and client responsibilities
The scope may be recorded in a proposal, quotation, email, statement of work, meeting record, invoice or other written agreement. Clients are responsible for supplying information that is reasonably accurate, complete and lawfully disclosed, for identifying material facts and for obtaining specialist advice where necessary.
Fees, payment and timescales
Fees and payment terms are those stated in the relevant engagement documents. Where no payment period is stated, payment is due within 14 days of invoice. Timescales are estimates unless expressly agreed as binding and may depend on access, information, client decisions, third parties and scope changes.
Confidentiality and data protection
Confidential information received in connection with an engagement will be used for that engagement and handled subject to any specific confidentiality agreement and applicable law. Personal data is handled in accordance with the Privacy Policy and any engagement-specific data arrangements.
Research, technology and external information
Sienda may use client information together with lawful public, commercial and professional sources. Third-party information can be incomplete or change over time. Appropriate analytical, research, data-processing, automation and AI tools may be used internally where useful; responsibility for professional work remains with Sienda.
Intellectual property
Clients retain ownership of materials they provide. Sienda retains its pre-existing methodologies, know-how, templates, frameworks, working practices and intellectual property. Usage rights for assignment deliverables are governed by the specific engagement terms.
Liability and decisions
The website and general materials do not constitute a substitute for advice tailored to a specific situation. Any limitations or allocation of liability applying to a particular engagement may be set out in its written terms, subject to rights and liabilities that cannot lawfully be excluded.
Governing law
Unless specific written terms state otherwise, these general terms are governed by the laws of England and Wales and disputes are subject to the jurisdiction of the courts of England and Wales.
Last updated: 30 September 2026.