Phil,
To my knowledge the Krays never came up to Brum. Their so called henchmen, the Lambrianous brothers did. Tony, Nicky and Chris came up but am told they had short shrift, in the clubs, for the coppers were well in with the club scene and were clued up by certain club owners.
Nicky and Chris got lifted in Brum for their involvement, with the Krays, in the murder of Jack "The Hat" Mcvitie. They finally got life sentences as did the Krays, as we all know.