Now that the UK is no more part of the EU, careful with the roaming / data if you use Google Maps or other "live" nav system while travelling in France !
UK mobile operators have confirmed data and voice allowances continue to be valid in EU, so no issue
I would add a small caveat. While the UK’s four major mobile network operators have all stated that they have no current plans to change their mobile roaming policies as things stand, there is no longer any legal obligation on UK mobile operators to provide surcharge-free roaming, or indeed, on UE operators to provide free roaming in the UK. It is not impossible, for example, that in future customers taking out cheaper mobile packages may find that free roaming is not part of it, but then for most people it's probably not a big deal.
Therefore, as this may be subject to change, those travelling to the EU in the future, or Europeans heading to the UK, may be well advised to check the roaming policies of their mobile operator before they cross the channel, as there is no guarantee that the situation will remain as it is now.
