Gangs of London: Season 1

For 20 years, Finn Wallace was the most powerful criminal in London. Billions of pounds flowed through his organization each year. But now he's dead - and nobody knows who ordered the hit. With rivals everywhere, it's up to the impulsive Sean Wallace, with the help of the Dumani family headed by Ed Dumani to take his father's place. If the situation wasn't already dangerous enough, Sean's assumption of power causes ripples in the world of international crime.
Perhaps the one man who might be able to help him and be his ally is Elliot Finch, who up until now, has been one of life's losers, a lowlife chancer with a mysterious interest in the Wallace family. But as the wind of fate blows, Elliot finds himself transported to the inner workings of the largest criminal organization in London. It doesn't end with the Wallaces though, as there are shadowy higher powers at play...