Ok so here is a short but hopefuly useful post on what I have achieved so far!
I bought 10kg of (broken) dishwasher tablets on ebay, 2p per wash this way. I will also carefully monitor the salt levels and use soda crystals so that the machine runs well and is happy overall.
I am keeping an eye on Amazon Grocery as they can have good deals too, never bought food from there before but when the have deals and also offer discounts for regular orders, some golden deals may be had there.
I'm going to use www.mysupermarket.co.uk more to compare prices and see deals, then if need be do my weekly shop in the best supermarket to bulk buy. It may involve slightly more petrol, but if we can bulk buy and make a family day out of it, it may work out!
Will keep an eye on local boot fairs and markets as they often sell boxes of veg very cheap, so I can make more pasta sauces, casseroles etc and get that slow cooker working for me again...
I will keep my Pricebook up to date, so far I know that 2p per dishwash, 10p per nappy (when I buy some, only buy 1 pack at the moment per month), 6p per clothes wash are best prices to aim for. Next ones will be things like toothpaste, loo roll (can I beat 22p per roll at Aldi!) and olive oil etc.
None of them run out, so no danger of wastage - if you have any ideas please do share!