Ta for that link to the 2-year-old Guardian article, Clav.
The more I read about Cottrell, the more opaque the sources of his money seem.
https://www.theguardian.com/politics/article/2024/jul/03/george-cottrell-nigel-farage-reform-uk-montenegro
His lawyers said in 2024 that he didn't have access to family money, "but has made his considerable wealth by working since the age of 17".
His ex-girlfriend says he lost £16m at a poker game in Montenegro, and he has admitted to having a gambling problem as a youth.
So even after his US conviction he appears to have inordinate amounts of cash to splash, and be heavily involved in gambling (famously convenient for laundering money, should one be that way inclined).
The business he registered in Montenegro, named Private Family Office, was set up in the name of "George Co" rather than Cottrell.
It's all a bit murky.