Terms of use

Last updated 2 November 2026.

1. What this site is

This site is published by Opstel Services Ltd ("we"). It provides general information about United Kingdom railway telecommunications standards and design practice, including pointers to the number, issue and clause structure of Network Rail standards, summaries in our own words, and downloadable templates and tools.

2. No reliance

Content is provided for general information only. It is not engineering advice, is not a substitute for reading the current issue of any standard, and is not a substitute for a competent design, independent check or approval process. You remain solely responsible for any design, document, installation or decision you produce or make using this site.

3. Accuracy and currency

We try to keep the content accurate, but standards are revised regularly and we may index an earlier issue. We make no warranty that any content is accurate, complete or current. Always verify against the current issue on the Network Rail Standards Portal.

4. Intellectual property

Network Rail standards are the copyright of Network Rail Infrastructure Ltd and are not reproduced here. Clause numbers and titles are given for reference only. Templates, stencils, example drawings and text on this site are the copyright of Opstel Services Ltd and are licensed to you for use in your own work; you may not resell or redistribute them as a product.

5. Parts information

Parts, makes, part numbers and PADS numbers are listed to help you find items in current use. They are not a recommendation or an approval. Check the current PADS listing, product acceptance and your project specification before specifying or ordering anything. Supplier links go to third-party sites we do not control. We are not paid by any manufacturer or supplier listed.

6. Accounts

Sign-up is free and uses your email address only. We may suspend accounts that misuse the site, for example by scraping or reselling its content. You can ask us to delete your account at any time by emailing hello@opstel.co.uk.

7. Liability

To the fullest extent permitted by law, we exclude all liability for any loss or damage arising from use of, or reliance on, this site or anything downloaded from it. Nothing in these terms excludes liability that cannot be excluded by law.

8. Governing law

These terms are governed by the law of England and Wales. Questions: hello@opstel.co.uk.