It's rather hard to tell because the pandemic has been such a confounding event; the UK did fairly badly on infection control but well on vaccine rollout. But it's still too early to do a "final" toll of the costs.

Things like roaming charges are much less significant than travel restrictions and quarantine requirements; travel and tourism has fallen off a cliff, so we can't separate out the Brexit impact.

We've another critical Brexit event coming up in the form of the end of the settled status transition period.