Theres a Taxman in Middlesbourgh - Brian Cockerill.
But he's more of a tough guy enforcer than an actual gangster.
He must be nearing 50 now anyway
No, this one must be someone else. The Taxman i have read about was mentioned in connection with the Gunn brothers from Nottingham in extracts from the book "Hoods: The Gangs of Nottingham - A Study in Organized Crime" by Carl Fellstrom.