Noticed the large tubs (1 Litre?) of Mackies ice cream at half price in my local Co-op today, down from £2.99 to £1.49. Couldn't find it on their website but there was plenty of stock and a proper printed price ticket so it looks like it's national.
This ice cream is second best only to the Kelly's stuff on '3 for one' offer at Morrisons. This is a good deal if you can't get to Morrisons or only want a single pack.