I think I'll just be my usual iconoclastic self and recommend hour-building in... France!
Did it in Florida and South Africa too, but these days I prefer to keep current in European airspace.
Contrary to what most people say, you can fly in France with just a modicum of knowledge of the French language, as long as you fly from/to controlled airfields, or to smaller ones (AFIS etc.) during HJ. FIS is happy to inform you in English.
Landing fees are extremely low (when they exist at all), they are usually not even charged, and you can land at commercial airports (OK, NOT CDG or ORY or NCE); I recently landed (and refuelled) a Cherokee-140 at Lille-Lesquin (29 Euros inc. handling) and Strasbourg-Entzheim (39 Euros inc. overnight stay and handling), and did T/GOs at Chalons-Vatry (far) behind an Air France B777-200ER doing the same. I don't think one could do that in Britain.
Most airspace is Class G til FL 195, granted lots of MIL R-airspace, but overall much less cluttered than Blighty.
A Robin rents for 90 Euros/hour wet (that's 60 quid), a Warrior for 107 Euros (68 Quid).
And you do get good restaurants on most airfields!
Cheers