If you can, set up the local foodbank address on your Amazon account,when you see something they could use, send it straight to them. Even better sign up to somewhere like hotukdeals or similar, and get a bargain sent.
Mine did a shout out for bags, I ended up buying a cheapish pack of a thousand, not great quality but better than no bags. Arrived day after order, right where they were needed. Rather than my house and me finding time to get them there. Which could easily take a week given my schedule some weeks.
You can also send larger packs of foodstuffs than you would normally buy in the supermarket. Like say a tray of rice pudding, ring pull ones, were ages ago about 4 quid on Amazon, I sent over 4 or 5 trays.
Much easier to just do it all online, my foodbank has an Amazon wishlist so it's all covered. Then any other charities you might like to donate stuff to, my local dogs charity that takes dogs in for rehoming I send dog food sometimes or blankets once when I saw a great deal on them.
This way stuff isnt sitting in my house, taking up space while I figure out how to get it where its needed.