Ok as an ex Kennel Club employee I will give you head ups just in case you are unaware. KC papers only confirm the dog is pure breed pedigree it will not state whether the pup is breed from healthy stock.
Check what the breeders mean by will be KC registered. Ask for the KC name & number of the dam & sire and you can call the KC to check that both parents are registered with no breeding restrictions and if the litter application has arrived and is being processed or has been processed they can confirm it.
Also the pups parents need to have had health screening for eyes. I've attached a KC information pack about the breed for you.
Sorry if you know all this and I'm teaching you to suck eggs and sorry if these are good breeders but I spent too much time on the phone dealing with owners who had been mislead by some breeders.
Thanks Macwooly, if I get one of the Cairns it would be my first ever purebred dog, I've always had bitsers! I'll read that fact sheet, thank you
And yeah Dorset is a pretty long haul for me, and I'm not even sure they would adopt him out to me if they couldn't do a home visit, so I'll keep looking, I'm having a LOT of fun looking.