This was a fast slippery aircraft mixing it with numerous airliners in one of the worlds busiest and most complex airspaces and I know it is legal but is it wise?
What is complex about flying IFR in the Lugdunum airspace ? Nothing, zilch, nada...its busy, alright, but the controllers are (usually) easy to understand and the procedures are not to far from ICAO standards. If one would ask me to cross said airspace VFR, IŽd ask him to go find another pilot....mixing with airliners ? Whats that supposed to mean ? You fly more sloppy when you, e.g. just "mix" with G/A traffic ?
And what has it to do with this accident ? The dude managed fine (from what is known up to now) and started (apparently) to lose it, when he needed to avoid an ultralight in the circuit (VFR! own separation, unlike IFR in London TMA)