But you already have a reputation, ex-mil, experienced, VIP single-pilot IFR, all over UK, other expeditions, exercises and operations. You just need to find a Chief Pilot who understands your banter.
One TR is very limiting. If you want to work, get an EC135 and MD902 TR. Also buy a Police and HEMS line check.
I was a freelance for two years in the UK. Its a terrible time worldwide to get a job, for new-hires and experienced pilots.
Will the Mil take you back for a couple of years? What about the schools/simulators. If you have QHI credential, use it at least until the market picks up a little.
Good luck