I use BT sim only, I have 40gB data package for £15 , but this was for when I was living in Sweden where I could use it . So if the costs go up the taxable company expenses will be used, I suppose or The client provides means of contact at their expense.
Got told by a former employer my roaming bill was too high, next trip abroad I turned the phone off, strangely the bills were acceptable after that ..
I use Tesco Mobile and this is what's on their site.
No Brexit changes to EU roaming (Home From Home) Our Home From Home service has not changed. You can still use your data, minutes and texts in Europe as you would at home. We have no current plans to re-introduce roaming charges in European countries following the UK’s departure from the EU on 1 January 2021. If anything changes, we’ll contact all our customers to let them know.
Amazed it took so long.
In the run up to the referendum I received a leaflet saying roaming charges would be imposed immediately following a leave vote “just in time for your summer holiday”… in 2016.
Funny how we got free roaming years after our European friends when we were members. I work with Swedes and my constant searching for wi-fi and paying for it was a great source of amusement for them wherever we were in Europe.