Aldi are selling boxesof their own brand (snackrite) crips for just £1.29 (25x 25g bags)
7x cheese & onion
7x ready salted
6x salt & vinegar
5x prawn cocktail
these are marginally more expensive per bag than the cheapest tesco/asda value (ready salted only) versions but these have multiple flavours, come foil wrapped and taste far better.