//No they haven’t. It used to be free in Turkey with a Vodafone.//
Clearly what they considered to be the market rate, Zacs. The market rate does not have to be the highest rate or a uniform rate. It simply has to be what the provider considers it can charge.
//The Brexiteers, as usual, bend over backwards to deny it.//
Deny what? The idea of Brexit is to rid the UK of the EU's pernicious influence over its affairs. That includes things like regulating private companies' pricing policies as mentioned here. If the UK government wants to introduce similar legislation it can do so. They could either do so off their own bat, or it could be included in party manifestos at the next GE. Or, of course, they need not.