Well, what are you waiting for? It can take 3+ months for the CI papers to be cleared. Get on with it! And there's nothing stopping you going back into uniform if you so wish.
Ask the CO of your squadron - several RAF bases have light a/c for hire which you will be eligible to take out. They're generally available at a very good price. I think my local, to my Surrey squadron, would be Benson. I am pretty sure there is one at Brize Norton too.