So sorry, I don't know of any breeders in Scotland, but I can confirm that I showed absolutely no sign of allergy to my beautiful Balinese kitten after having been allergic to cats throughout my life. I bought some PetalCleanse to wipe down the kitten's fur and prevent allergic reactions, but never needed it.
If possible, your DH and children should spend a bit of time with the adult cats before committing to buying though. I spent about an hour with Balinese cats and was astonished that I didn't have any asthma or weepy eyes.
Also, I recommend you ask about breeders over on the Litter Tray topic, as there are lots of very knowledgeable people over there. I wish I had done that before buying our Balinese kitten, which, unfortunately, turned out to be unwell and died after a couple of months. I wouldn't like anyone else to have to go through this.
I have had a siberian, he has recently passed away and have already put my name down for a kitten. After having a siberian I am hooked and in love with the breed and they are great for allergies. Just don't get a Neva masquerade as been told be a few breeders they aren't so good for allergies. Can't help you on Scottish breeders but there are a few in the north of England xxxx