Light aircraft gone down from Nantes to Cardiff near Guernsey last night?

[Croesy Blue]

Questionable Piper Malibu safety record = fact
Icing present at 5,000ft = fact
Pilot requested descent to 2,300ft = fact
No maday call = fact

Other issues present - unknown

There’s a good chance you’re right but you can’t say that’s the only possible causes at this stage.