I suppose the one thing missing from all the previous replies is a simple answer.
Does the RAF still possess an all weather capability?
The answer is yes.
If someone had asked the RAF to bomb Derwent Dam yesterday they could have, with a choice of weapons.
Asking for a peace time flypast isn’t quite the same thing.
All weather in 1943 and all weather in 2018 are two very different kettles of fish. Thankfully the potential risks are far less than they were in 1943 as well.
BV