Talk:United Kingdom/@comment-91.158.123.165-20190421084755/@comment-24682153-20190421092435

These are the general time-FUP rules of roam like at home in the EU. Three has enforced them sporadically in the past against permanent users of their extended roaming zone. But it's not known about EE oder Vodafone so far. So give it a try. They must warn you a few weeks before they will actually apply surcharges.