The FAA does excellent work and so they do on this matter
True, but only in respect of US airspace and the same goes for Avweb. The OP is in the UK and, therefore, both references are irrelevant. As Beagle points out, SERA.6001 states,
"Class A. IFR flights only are permitted." In accordance with FCL.600, operations under IFR are not permitted unless the pilot holds an instrument rating.