Remember guys, if you have dependants such as children or elderly parents that you care for, the company cannot deny you flexible working. It is enshrined in UK employment law. All you need to do is to apply for "flexible working" iaw with UK employment law, and after a chat with your base captain you will be offered your choice of part time contract.
It worked for me, and it can for you, just go for it and threaten a grievance if they try and fob you off.
Enjoy the part time, its great.