At the time of writing, literally nobody knows what will happen with Brexit, but there’s no reason to think that any of our plans will be disrupted. We are monitoring the situation closely and will keep everyone updated if we become aware of any big changes.
In the meantime, here’s our understanding of some of the tricky questions. (But we are not legal experts, and nothing on this page should be construed as legal advice. It’s your responsibility to make sure you’re able to travel.)
Eurostar and the UK government have both said that Eurostar will run as normal after Brexit, even if there is no deal, and even if flights are disrupted. (See this news article.)
Health and travel insurance
It’s up to you whether to take out travel insurance, but it might be a good idea, especially if the current European Health Insurance Card stops working in the event of a no-deal Brexit and Brits lose their right to no-questions-asked emergency healthcare in the rest of the EU. (See this news article.)
Passports and visas
A UK passport will continue to allow you to travel to the EU after Brexit. The British government is now recommending that travellers after Brexit should have 6 months left on their passports at the start of their trip, so that’s worth checking. You can renew your passport early if it’s close to expiry.
There are no plans for the EU to introduce visa requirements for British citizens, even if there is no deal. But there has been talk of non-EU citizens needing to obtain a travel authorisation document (called ETIAS) for about 7€. How this will work and when it might come into effect is unclear, so keep an eye on the news. (There is a very detailed Q&A if you want to know more.)
As an EU citizen, you can use your home mobile contract in any other EU country without incurring additional costs. Depending on what happens, this will probably come to an end after Brexit. In the event of no deal, the government is currently talking about capping roaming costs at £45 on top of your usual bill, though this would be a usage cap, not a cost cap (i.e. your phone would stop working when your bill hit £45 above normal). (See the UK government advice.)