In my local Sainsburys the Linda McCartney sausages are £1.59 for a pack of 6, but if you buy two packs you save £1.98...making it cheaper to buy one pack than two. A great deal for veggies and none-veggies alike, they're better than normal sausages and not full of whatever they put in real ones (it's probably best not to know).
I don't know if it's across the country or not, but I assume it will be.
Ok, I messed up...I meant cheaper to buy two packs than one. I can't edit for some reason.