Salaried staff in the UK may be considered to be employed 24/7, even if normal contractual hours are 9-5; i.e. you're not supposed to take a second job. Of cour

Salaried staff in the UK may be considered to be employed 24/7, even if normal contractual hours are 9-5; i.e. you're not supposed to take a second job. Of course, a hobby isn't a second job, but that argument might not wash at a tribunal. It's best if you get your employer to recognise that your open-source work benefits them, so they explicitly agree that your FOSS work is part of "the course of your employment", even if you are forbidden to do it during office hours. This definitely needs to be clear in your contract; if it's not clear, the confusion is likely to be resolved to the employer's benefit.