I'm fairly sure the OP's photo is real, not a Photoshop job. If it is a PS job, it's well done, by someone who knows the airplane. The "AIR FORCE" sits further aft than on USAF examples, because the word "ROYAL" is longer than "U.S.". Also, note the piles of brown craft paper and tape on the floor - this is a paint hangar. The fact that there is no sort of tail number or other ID on it tells me this is just after the major paint work was done, but before any detail stuff was done. I strongly suspect this is the scheme - at least to start with - that the RAF will be using.
Here's what she might look like in full 51 Squadron colors...
