BBC reporting NO RN attack subs cyrrently on station due to maintenance overruns................
That's what happens when you don't build any for the best part of a generation let numbers drop and then have a small population of old hulls trying overlap with a small population of new hulls likely to run into teething problems coming into service.
We no doubt have a number of attack boats which is at least two or three down on the sensible minimum.
And the population of experienced officers in the branch drops as well. Makes for a small community - and it just takes a few extra to make early departures and you lose critical mass there too.