eunion1-8, Exercise 3: One everyday benefit

Model answer (one possible answer, on roaming):

What it gives: since 15 June 2017, "roam like at home" means people pay domestic prices for calls, texts and data when travelling inside the Union.
A criticism: operators argued the price caps squeezed their income and could raise domestic prices; some also note that fair-use limits can apply.
Brexit: UK mobile operators have no obligation to follow the rule, and policies vary by company.

(Other options: consumer rights, such as a 14-day cooling-off and two-year guarantee, with the UK keeping similar rights in its own law; GDPR, with compliance costs and cookie banners as a criticism, and the UK keeping a copy of the rules; protected food names, criticised for favouring established producers, with the UK running its own scheme since Brexit.)