At Costco presently they are selling a 6 pack x 250g (avg 8rashers) for 6.45 (6.29 for unsmoked). Buy two packs, save an extra 5 pounds.
Purchase one of each and that works out at just under 65p per pack.
packs can be frozen ;)
£7.74 (price based on 1 x smoked 1 x unsmoked)