I believe that in France the upper age limit is 60 - i know for a fact that there not to happy to allow foreign registered a/c into French airspace if the commander is over 60 - allthough dispensations can be granted by the French DGAC.
I dont know if this is the same in Germany, In the UK it depends on the Operator some will allow you to fly till your 65 other's say you have to retire at 55, It will also depend on what your flying as well
brgds
W.G