You don't need to be UK citizen neither to live within the UK for signing this one, and it goes in the right direction, so...

https://keepthingsopen.com

An open letter
asking NHS England
to keep its code open

Code paid for with public money should be open to the public. This principle is enshrined in the UK Government Design Principles and the NHS Service Standard. It is now being walked back. We are signing this to restate the case.