Backtrack :
For a Flight from Nantes to Cardiff……… What is he doing at 5.000 ft in a plane that can go in the higher Flight levels avoiding any bad weather and ice in the first place?????
Being at 5.000, and being in ice, got him to request the lower altitude of 2.500. What happened afterwards is pure speculation.
But for a flight from Nantes to Cardiff? ? ? Why on planet Earth choose a low cruising altitude and ending up at 5.000 ft over the Channel????
Me in my Jodel 120 at 5.000 ft, that's an understandable cruise. But in that airframe? ? ? ? For that distance? ? ? In that weather? ? ?
Sorry, don't get it.