Do you still have the PDR (blue folder)? If so, stick all your experience in there. Keep it simple - aircraft type, registration and description of tasks carried out. Get it all authenticated by an EngO.
One other thing worthy of note. There is a misconception amongst forces guys that they just turn up on day one as a civvy and 12 months later get a shiny new licence. It isn't as straightforward as that I'm afraid. If you do not have a comprehensive civil log book covering all ATA chapters then you will not meet the requirements for basic licence issue. I know a couple of guys who have been out a few years now and they are still plugging away trying to get the necessary experience, it can and does take time. The 12 months is an absolute minimum.