Isn't it true that GPS is REQUIRED for navigation when flying IFR in Europe?
Nope but you are very restricted if you are not BRNAV and a complete pain to ATC unless your in a very low traffic area or class G when they don't care anyway. Some countries it maybe true.
Its would be interesting to see where this comment comes from. I can't believe that the AAIB would come out with such a statement without some form of foundation for it. It just not they way they operate.
Mind you it will more than likely be taken the same way as spin training. Doesn't matter what the facts are about accidents a large minority will just say its a load of rubbish anyway because it disagrees with what they think.