Quite hard to find if you don't know the area but if you come into the trading estate look immediate left and you'll see it beyond the metal fence. They sell everything vegan you could possibly imagine. There are fridges and freezers full of cheeses, salamis, tofu and seitan based 'meats', and don't forget marshmallows. My particular favourite is the Vegusto cheese range which is definitely the best vegan cheese I have ever tasted to date. At £4.99 a pack it ain't cheap but it's worth it. As well as savoury foodstuffs you'll find a huge range of confectionery and household and cleaning products. If you fancy a drive to check it out I can't imagine it being a wasted trip. Otherwise, they also do everything online.
Cons: hard to find, some items are pricey