I don't know a great deal more than you've said.
I'm told (unconfirmed) that the Spit was one of the build-for-sale models, being flown by a Dutch owner who was uninjured.
I'm pleased to say that, contrary to reports on another thread, it was neither Ray Hanna nor his historic Mk IX, MH434.
Ray is safely in Switzerland with the OFMC team - and not yet 73!!
