[lower]

Not within the EU. There is EU legislation requiring the costs within the EU to be that same as at home.

https://europa.eu/youreurope/citizens/consumers/internet-tel...

[dazc]

Pre-2017?

[lower]

EU legislation applied in the UK until the end of 2020. The UK's withdrawal agreement was finalized in January 2020, and there was a transition period until the end of the year where all EU legislation still applied.