Scotland was not part of any English empire.
Wales(1284)& Ireland (1607) were by conquest part of the English Empire prior to 1707, when Scotland joined the United Kingdom by choice.
Nor were the Shetlands and Orkneys ever English, they were Scots also in 1707, having passed to us from Norwegian ownership in 1468 and 1472. The Shetlands were also originally Pictish anyway, having been conquered by the Vikings. And the Hebrides has been Scottish since 1266. And again, previously Norwegian, not English.
The Orkneys were occupied by clearly Celtic people when they were conquered by King Frosti from Finland (who, BTW, was not leading an Indo-European group at the time, but folks who were clearly Fenno-Scandian).
So, yes, the English empire of their equivalent of the "near abroad". That's why folks there still speak English.
The Enclosure Acts created severe social conditions that resulted in what are called "social pathologies", e.g. rebellion, riot, war, gangs, etc.
Good thing UK had access to North America else they'd been eating each other.