7. But perhaps this is not a coincidence: an outsider may well be preferred to a more locally-rooted candidate from one of the other towns.
I've seen something similar as a possible explanation for the curious fact that none of the last three Orkney & Shetland MPs have been from either Orkney or Shetland.
Huh, that makes some sense. Particularly given that, when you split them up, that curiosity goes away.
They're separate constituencies at Holyrood, and the MSPs for the Orkney and Shetland seats are far more likely to have grown up on their respective archipelago.