Brits could face roaming and data charges in Europe in case of no deal Brexit government sources have admitted. On Thursday the Brexit department will release a fresh raft of technical Brexit papers including one on mobile phone charges. Without a deal sources say phone users could see the return of levies for using mobile devices on the continent. The pro-Europe Best for Britain campaign said the re-imposition of roaming charges could cost business people visiting the EU up to £778 a month. Liberal Democrat MP and Best for Britain supporter Layla Moran said: "The cost of a hard Brexit on British travellers is becoming abundantly clear. "Millions of people are facing higher costs to make calls and texts abroad because of the Prime Minister's botched Brexit plans." Phone roaming and data charges cost British consumers an estimated £350m a year before they were abolished by the EU. But several phone companies have already promised they would not reimpose the charges - including Vodafone and Three. While others would be unlikely to risk losing customers by introducing the fees. Government sources also say there could be UK legislation to stop the charges being imposed. Earlier this year the Government said that the UK will not be part of the EU's Digital Single Market but did propose a "digital relationship" that covers telecommunications and infrastructure. Other areas covered by the documents will include the impact of a no deal scenario on standards relating to the environment and vehicles. The papers will be published after a special meeting of the Cabinet focused on how a no deal outcome could be handled. Read More Latest Brexit news Meanwhile, the first meeting of the Joint Ministerial Committee on European Negotiations since Parliament's summer recess will also be held Thursday. It will bring together senior ministers, members of the Scottish and Welsh administrations, and representatives from the Northern Ireland civil service where powersharing is currently suspended. Phone roaming and data charges cost British consumers an estimated £350m a year before they were abolished by the EU.