I was doing my grocery order last night and found this offer, for a free 160g pack of Low Low Mature Cheddar slices, available with your online order. You just add it to your basket and the price is taken off at checkout. I got mine today!
Unfortunately this has been running since 13 September, and the last day of the offer is 22 September. Still time to take advantage if youre getting your groceries tomorrow or Wednesday. :)