Hi S_P,
Our foodbank only takes tins, packets and longlife UHT foods, it can't take fresh (or frozen).
The easiest way for us to donate is to buy extra items whilst shopping, and leave them at the store's collection point. All our local supermarkets support them, and there's a list of the items that they currently need most, to guide us as to what would be most helpful.
Tinned tomatoes are on the list by the way, which is probably just as well because they'd still be waiting for ours to ripen here this year!
G&R