This does not mean that mobile operators will necessarily apply new charges. The three main mobile providers in Ireland have indicated that there will be no changes to the current roaming arrangements for their customers. However, this could be subject to change over time. In any event, all operators must make customers well aware of any roaming charges they could incur, if and when, they use mobile devices in the UK. If you have any concerns or you wish to check, you should contact your provider directly.