We have just got back from touring the Alps and found that as long as you use the big chain supermarkets then prices worked out cheaper than in the UK for most things
Fuel is definably dearer than in the UK. especially if you fill up in the toll services. Both Switzerland and Italy were cheaper than France.
Tesco just of the M20 is the last stop for cheap fuel before the Tunnel so we fill up on the way out and again back
Food prices in restaurants is comparable to UK however its the beer prices in bars that’s the stinger. We were chatting to a guy in Tignes Le Lac who had just paid 14 Euros for a larger.
We found a SPAR in Tignes 1800 on the way back to the campsite that didn’t have a drink licence however they had a beer garden and allowed you to use it for stuff purchased in the shop so local beer was 2 Euros. Great idea but made the last run down to the van interesting after a few