This thread has slightly lost its way. The RAF is running short of Navs for the Tornado fleet. The sausage factory was closed too early and that was very short-sighted, especially with the threat of extending yet another airframe. There are a lot of guys there with masses of experience, many of whom are content to serve out their days in the cockpit. Beyond that, Manning has a problem.
The other side of the coin is the multi-engine/helo world where WSOps, in their various guises are still being trained. That will, with any luck, soon include P-8. In that area, the RAF is not short of WSOps, has a supply line and, recruiting permitting, would be able cover the required 'footprint'.
So, to go back to the OP, yep, short of navs. Navs only required now for Tornado. Tornado's days may well be in the balance. The Chancellor may have noticed that his shiny Typhoon jets are getting pretty good at air-to-ground. That's a worrying thought.
P-8 potential buy (God, I hope so), WSOps required, 45 Sqn doing the training and a good number of guys in "seed corn" posts in the States, where the UK's LRMPA expertise currently rests.
So, is there a problem? Yes, for the Tornado. For helo and multi WSOps, No.