Pickles I have happily consumed in the UK:
* Dawtona sour gherkins (Tesco)
* Bramwell pickled gherkins with chili (Aldi)
* Vlasic stackers (South African store on Amazon)
* Vlasic dill pickles (South African store on Amazon)
By far, the easiest/cheapest to obtain are the Aldi ones, and I use them for pickle salad, sliced on burgers, and as a palate-cleanser in our several-times-a-week cheese & port times. The Polish ones (Dawtona) are probably closer to taste, but they require a Tesco shop. And getting actual Vlasic ones require pretending I don't know how much I'm overpaying for the things... and that's a big ask.