EE is far and away the best in Scotland, and we even have 5G in some areas. You can pick up a sim at any phone shop.
But I do like Rob R's way :-)
More importantly, when you are going to be near Edinburgh or West Lothian, let me know. Drinks, food, chat - even accommodation if you are desperate
MkIIa, blue lit buttons, memory upgrade, 1Tb in Subaru Forester STi
MkII, 240Gb in Mark Lord dock
MkII, 80Gb SSD in dock