Thanks again for all the advice
I think IFR all the way is going to be the most sensible. Just noticed ETHN is Mil
Think I'll give that one a miss! So what I really need is more recommendations on ILS airfields that have 100LL and are GA friendly without being too extortionate en-route through Germany (Siegerland looks very promising, thanks 172D) and Austria. I can probably get away with 1 fuel stop but I think 2 will be more comfortable! Also any airspace to avoid would be helpful!