Impressum
Information in accordance with legal requirements for commercial websites in the United Kingdom and internationally.
Company Information
Company Name: Keystone Limited
Legal Form: Private Limited Company
Registered Office: 30 St Mary Axe, Level 28, London EC3A 8BF, United Kingdom
Company Registration Number: 14728593
VAT Number: GB 428 7159 32
Contact Information
Email: info@keys-tone.com
Telephone: +44 20 7283 4617
Postal Address: 30 St Mary Axe, Level 28, London EC3A 8BF, United Kingdom
Contact Form: Available at https://keys-tone.com/#contact
Responsible Persons
Managing Director
Name: Cassian Whitmore
Position: Managing Director
Content Responsibility
Name: Cassian Whitmore
Position: Managing Director
Responsible for website content in accordance with applicable regulations
Technical Responsibility
Name: Naomi Prescott
Position: Technical Director
Responsible for technical operation and maintenance of the website
Regulatory Information
Keystone Limited is registered and operates in accordance with the laws of England and Wales. The company is subject to oversight by Companies House and operates under UK commercial regulations.
Supervisory Authority: Companies House
Registration Authority: Companies House, Crown Way, Cardiff CF14 3UZ, United Kingdom
Professional Body: None applicable (not a regulated profession)
Liability Disclaimer
Content Liability
The content of our website has been compiled with care and to the best of our knowledge. However, we cannot assume any liability for the accuracy, completeness, or timeliness of the content. As a service provider, we are responsible for our own content on these pages in accordance with applicable law. However, we are not obligated to monitor transmitted or stored third-party information or to investigate circumstances that indicate illegal activity.
Obligations to remove or block the use of information under general law remain unaffected. Any liability in this regard is only possible from the point in time at which we become aware of a specific legal violation. Upon notification of such violations, we will remove this content immediately.
External Links Disclaimer
Our website contains links to external websites over which we have no control. We therefore cannot accept any liability for their content. The respective provider or operator of the pages is always responsible for the content of the linked pages. The linked pages were checked for possible legal violations at the time of linking. Illegal content was not recognizable at the time of linking.
However, permanent monitoring of the content of linked pages is not reasonable without concrete evidence of a legal violation. Upon notification of legal violations, we will remove such links immediately.
Copyright Notice
The content and works created by the site operators on these pages are subject to copyright law. The reproduction, editing, distribution, and any kind of exploitation outside the limits of copyright law require the written consent of the respective author or creator. Downloads and copies of this site are only permitted for private, non-commercial use.
Insofar as the content on this site was not created by the operator, the copyrights of third parties are respected. In particular, third-party content is marked as such. Should you nevertheless become aware of a copyright violation, please inform us accordingly. Upon notification of violations, we will remove such content immediately.
Alternative Dispute Resolution
The European Commission provides a platform for online dispute resolution (ODR), which can be accessed at ec.europa.eu/consumers/odr. We are neither obliged nor willing to participate in dispute resolution proceedings before a consumer arbitration board.
Data Protection Officer
For inquiries regarding data protection and privacy matters:
Contact: Cassian Whitmore
Email: info@keys-tone.com
Please refer to our Privacy Policy for detailed information about data processing practices.
Professional Indemnity Insurance
Keystone Limited maintains professional indemnity insurance appropriate to the nature and scope of our business activities, in accordance with UK commercial practice.
Additional Information
This impressum is provided in accordance with legal requirements for commercial websites. For specific legal obligations under your jurisdiction, please consult the relevant regulations.
Last updated: December 15, 2025