Instead of a Mafia in England we have various groups called 'Firms' operating around major city's in the country back in the 90's you had the Essex Boys and Kenneth Noye's Firm in Kent both of those have fallen.

I know that there's a Firm in Canning Town that even Gerry Adams crew won't mess with, the Johnson Brothers in Wolverhampton went down a couple years ago with Carl being back in jail after failing to re-pay money gained from Fraud whilst his brother Anthony repaid and is still out on the streets (dunno if he's active).

Any other Firm's you can name?