As a rule, pizzas in the UK are either bland and generic (as with Pizza Hut and its notional competition) or they are toasted open sandwiches for rat meat, as with the pizza emporiums in my immediate neighbourhood, made by people who know even less about it than I know.
Bizarrely enough, I can always get a very good pizza from the takeaway pizza place in the neighbouring village to the village where I grew up. I have been an occasional customer there for 35 years and they are still the same as they were when I first went there; they haven't even painted the joint.
There is an Italian restaurant on the London Road in Leigh on Sea, near Southend, in Essex, which used to do a really nice pizza, but I haven't been there for 20 years so anything might have happened to it now. The staff there would never agree to add more than 3 extra toppings; the head waiter once explained to me that this is where the American chains get it wrong. In the USA, bigger and more = better; in Italy, quality = better or worse. The waiter was quite definite that a good pizza doesn't need umpteen different toppings, but the extra toppings are always useful to disguise a bad pizza. I never had a pizza in that restaurant I didn't like.