Thought it might be handy to have a thread to add to whenever good prepping stuff is on offer, please add anything you find going cheap that might be handy for stocking up.
East End tins are four for £1 at Tesco until 12/3/19 - tinned tomatoes plus various types of beans. Reasonable quality in my experience.
Also Morrisons 2 for £2 100ml sensitive toothpaste - my teeth really hurt if I don't use the "sensitive" stuff 
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PLEASE don't use this thread to debate prepping, there are so many other threads already!
Any other good offers I need to know about?