What I usually find very very annoying is the EU data roaming charges. The EU zone operators were ripping of subscribers like a hungry polar bear from hibernation. Moving around europe is easy on fast trains and while connected to data on the GSM networks you'd get a nasty shock bill at end month with data roaming charges. So gross were the charges that EU had to intervene to force europe operators to implement a limit.
It's good to see UK guys insisting for fair voice call pricing. The rest of europe should follow suit. Also the should call for roaming calls reduction to africa. Marine cables are now active and no need to overcharge europeans for calling africa. Such bs charging. Time for this profiteering is over...