Go to Calais!
I recently went there and did 4 ILS/GNSS approaches prior to landing, paid my €10 or so fee (I forget how much exactly but it wasn't much), and then did a couple more GNSS approaches on departure, at no extra cost.
The best thing s that I then got to claim the £80 drawback on the fuel for the 40 minute flight there from North Weald!
