I spent most of my career in Silicon Valley, where employers routinely take the position that they own every thought their employees have, and every work they create. That position, legally enforceable or otherwise, has always rankled me.
I've recently moved to the UK to start a tech business here (https://www.hackworthltd.uk), and now that I'm on the other side of the table, I very much wanted to create a personal projects policy that was as employee-friendly as possible, while still protecting the interests of the business. I hired a UK IP lawyer to help me draft an acceptable policy, and I'm happy to share that with you, if it helps.
The intellectual property section of our employment contract is mostly standard boilerplate, as I understand it, except that it refers to our personal projects policy, which is contained in our staff handbook. I've copied the relevant sections of both and put them here:
https://gist.github.com/dhess/21b7d2d72c4f9d4e0cdd8004385ef7...
Please feel free to use it as a reference in future negotiations with your employer(s).
Comments from others are also welcome! I'm open to any suggestions for how it could be improved.