One of the newer Heritage locations.
I came here for lunch with my parents on a Sunday. The place is well decorated - with one wall covered with prints of London roads, giving the appearance of dining al fresco. There are a handful of tables here, as well as a TV in the back on the restaurant which was playing the soccer game going on at the time.
I ordered a steak and onion pie with fries - it came out to under $10. The pie was very good, especially with the gravy provided. I gotta add, however, that I can't comment on authenticity as I've never been to the UK.
My parents ordered the seafood combination platter, which came with 3 scallops, 4 shrimps, haddock, and halibut. They seemed to enjoy their meal as well.
The food wasn't too oily like some fish and chip places can get. That's one of the keys for me. Definitely worth giving Heritage a shot if you're nearby. Hope they open a location in central Mississauga!