Just a random thing that came into my head, with a POD after the Norse colonize Iceland (and preferably after the Icelandic Commonwealth is founded), how could Iceland come under Scottish control, and when?
Easy and a bit cheaty one: Denmark offered to sell Iceland twice to Britain, once in the 1780s and once in the 1850s. Have this happen. OTL more or less unaffected. Then have the SNP do really well in Britain and Scotland become independent, taking Iceland with it due to the shared fisheries or something. (And also because, say, in the intervening period lots of Scots went to Iceland for some reason?)
They did? (edit- damn that ( : o )is not embarrasment! it is shock!!)
I aint ne'er heard of this one.
I think at least one of those was straight after a massive earthquake that killed lots of people there and they probably wanted us to pay for it...