Just to make it clear anyone can fly in an ex military aircraft in the UK.
The problem comes from payment, if your happy to cough up for half the cost of the flight then some pilots would be happy to take you for a flight just so they get some time in the air as well but you couldn't pay for all of the flight however as has been noted within the next 12 months we will be allowed to operate commercially so expect the costs to go up a bit.