Freelancing in UK
My advice would be to contact all the operators directly to ask about work opportunities.
I left the military about 2 years ago and with nearly 4000 hrs, with the intention of freelancing. I did AS355 and 350 ratings, but found that operators were unwilling to give me work without any experience of flying in the outside world - how do you get that experience without doing any work?
In the end I chickened out and got a proper job as a police pilot, but I now do some freelancing for private owners on a couple of AS350s, although not enough to pay the mortgage.
However, if you are sure that this is the way ahead for you, then you just need to look at what types are the most popular in this country. Robinsons are the most numerous singles, although many are flown by their owners, so I would consider B206 followed by AS350, and AS355 are the most numerous twins.
I would also say that you would be a much more useable prospect with an IR, so you should definitely make use of the exemptions that you get as a QSP for 3 years after leaving.
Feel free to pm me if you want any more info.
QOS