The Brighthelm Centre's cafe do the most awesome sandwiches and they're good value for money. Service in there is nice and friendly too. It's a very handy place to grab a good inexpensive lunch if you're out and about in town.
Absolutely awesome cakes and lovely bread too. Someone even bought me a quiche in there once and I normally don't like quiche but it was lovely. Their chewy bread is particularly nice too.