I had a next door neighbor that used to work on the oil rigs, he was English. Need I say more? My Dad voted on the Scottish Independence referendum in the 1970s and oil was not an issue at the time and very shortly oil will cease to be an issue again. Most of the east of England used to be under Dane law. If history took a slightly different course then people could have argued that the east of England is a distinct nation that has a long history, more so than Germany etc. The Romans referred to Britain, not England. The frontiers of the Roman Empire extended as some points far north into what is now Scotland.
In my office (in England) 3/7 have substantial Scottish ancestry and 4/7 have red hair (two of those that have red hair are the ones without known Scottish ancestry). OK. I accept that this is not scientific. But it just makes me laugh when the Scottish Nationalists try to paint themselves as Scandinavian nationals. Give me a break.