Sid
To try and answer your question here are some examples of things that Romans introduced to Britain that are still in use today:
Architecture, Art ,Literature. Language(Latin)
Sanitation (sewage) Aqueducts, Education, Irrigation ( water supply)
The calendar, Coins, Cement, and bricks. Public heated baths
Turnips and carrots. Apples, pears and grapes,Cabbages & peas, Benefits (free food) for poor citizens
Roads, Paved streets and pavements.,Wine, Cats ,Stinging nettles
Towns, Glass, Street Cleaners, Shops
Laws, Tenement Blocks, Public order, Firemen and Police
Parks, Public libraries, Public notices and advertisements.
I,m sure there are plenty more like pizza restaurants ...lol