I have just noticed that flight FR614 from Derry to Stansted has been diverted to Luton, The Ryanair website states due to weather at Stansted.
I live 20min by road from the airport and the weather here is very warm with no wind and clear skys
--- I think I know why this divert took place !
Another diversion FR4153 BGY-LTN diverted to STN due night runway closure.
So weather ? I dont think so .