Does my EU SIM card offer free roaming in the UK (Post-Brexit), or will I incur charges?

Following Brexit, the United Kingdom is no longer part of the EU's 'Roam Like at Home' (RLAH) initiative. This critical change means that most European (EU) carriers, such as Orange France, Deutsche Telekom, or Telefónica Spain, will now apply standard international roaming tariffs when their SIM cards are used in the UK. These charges can be substantial and unpredictable. For heavy data users, remote workers, and digital nomads, a DataESIM UK plan provides a far more cost-effective and high-performance solution, circumventing exorbitant roaming fees and ensuring consistent high-speed connectivity.