Nope...
At least 9 subs still have fuel onboard...
And no complete sub has been totally decommissioned since the '80's...
But hey, £7.5bn already allocated to disposing of said subs (at a date yet to be arranged) is but a drop in the ocean...
Sellafield is estimated to be costing £70bn to clean up, so it appears to be a game of 'pass the radioactive parcel'...
(One must of course realise it will be at least double that amount)