From 1st January 2021 surcharge-free roaming when you travel to EU and EEA countries will no longer be guaranteed.
The mobile operators (Three, EE, O2 and Vodafone) have said they have no plans currently to change their mobile roaming policies.
The government has legislated to protect consumers from unexpected charges from 1 January 2021. This is to ensure that obligations on mobile operators to apply a financial limit on mobile data usage while abroad is retained in UK law.
The limit has been set at £45 per monthly billing period (currently €50 under EU law). This means you cannot continue to use mobile data services when roaming unless you actively chose to continue spending. The government has also legislated to continue to ensure that consumers receive alerts when they are at 80% and 100% data usage.