Twiglets. We rarely get them but I can eat a packet.
I've not encountered tinned steak and kidney pies.
Walkers crisps/chips (I hate calling them chips - to me a chip will always be a French Fry but even over here, some seems to want call crisps chips...) are a big brand here. There used to be 2. I think what used to be Smiths became Walkers and I don't know what happened to Golden Wonder (which incidentally is also a variety of potato). When I was young, I vaguely remember there used to be a blue bag in the pack that held the salt so you could control how much you wanted. It made a sort of revival at one point with a different blue bag (the old one was just twisted, the newer ones were sort of factory sealed).
Again, it's not something we normally get at home. A posher and a bit more interesting brand is Kettle (whos UK base is Norwich - not far from me). I seem to remember there was also a brand from S Wales called Real Crisps.