I'm just reporting how it was.
Farage didn't have a Cockney background. His father was a stockbroker and young Nigel went to Dulwich College, one of the more snobby public schools, so he wasn't lacking in opportunity. He left school at 16 and going to work on the metals exchange would not have been considered a success.
As the article states, the commodities traders were renowned for their hard drinking and right wing views. It was not uncommon for them to break into Nazi drinking songs in the pubs near the exchanges. I remember them well.
In any case, Farage hasn't achieved anything noteworthy, either as a trader or politician. Apart from being an irritant, he has not changed any laws, he has never campaigned for anything good. He has never done anything tangible, apart from fiddle a load of expenses. Presumably some of the money went to finance his children's private school education, even though he lives in an area with grammar schools. He's just whinged and portrayed himself as a victim and convinced people that he's somehow on their side. As the article says - he's a salesman, but he's never actually produced anything.