Alright, as part of the Xmas food junk shop, I spotted Aldi were doing these.
https://www.aldi.co.uk/p/63452/0
The one I picked weighed 1.5kg and was £3.81.
Comes with a fat cap that trims off nicely, should make some half decent cracklins.
My interest in these - Aldi will have no doubt brined these to hell and back to get more moistuure into the meat - saving me a job!
So I've got one on the smoker right now and shall let you know in ~10 hours!