This film reminds quite a bit of the Peaky Blinders series, mostly in the first half.
In the 1960’ies London, of which some stages remind of Peaky’s Birmingham, two brothers virtually run the city. They have both legal and illegal business, are ruthless towards the opposite and try to work themselves towards common businessmen.
That is to say, one of the half of the twins Kray does, the other prefers to be a gangster. While visually alike, the Krays are each others opposites character-wise and this starts to clash when the ideas start to run in opposing directions.
As I said, the first half of the film reminds of Peaky Blinders. In a gritty city wealthy gangsters live their luxurious lives. After a while the film moves more towards a typical mafia film, but it is still fairly well done.