Once Brexit enters into force, i.e. on 1 January 2021, the European rules on international communications will no longer apply to calls and SMS messages from Belgium to the United Kingdom (and British numbers). As a consequence, operators will no longer be obliged to respect the tariff ceilings provided for in European legislation.
Operators which decide to no longer apply these tariff ceilings must notify their customers one month in advance of the new applicable tariffs.