Jordans Fruit & Nut Muesli 750g boxes are £1.25 until 14 July. Also online. They're £2.50 in Sainsburys and £2.78 in Asda.
Some other Jordans mueslis are also on offer, eg. Nut & Seed at £1.39.
Plenty of stock in my local (Norwich south) and best before Feb 2010 so plenty of time to eat. Might be worth looking around the store if there is none on the shelf... in my store some varieties were sold out on the shelf, but there was a big stack of boxes in a different aisle.