Quite surprised this hasnt been posted yet, but Lidl are selling 29.5L electric coolboxes for £29.99 from today! They are not a bad size, enough room for a good days food for a small family, tall enough to take a 1.5L bottle standing up, and with the benefit of having both 12V and 240V plugs build in, so you can use it in the car, in a caravan, chalet, etc etc etc. Perfect with the Bank Holiday coming up.
Plus, if you pick up the voucher out of the Mirror plus anything over 1p in price while in store, you can get a fiver off too. Picked one up this morning at Lidl in Rowley Regis, seems well built!