RAF,Anything military,i`m unsure of.
So far as flying civilian aircraft commercially,you would be able to do this if you paseed the lantern test got your class 1 and all the other bits etc.
If you cannot get the lantern test,you`d have to join the que like me and ALOT of others until hopefully progress is made with the testing.
You are still able to get a restricted class 1 medical,thus you could become and instructor if thats something you`d like to do.