Didn't believe Andrew Buchan as a scary gangland-type boss, though his Northern Ireland accent was impressive for someone born and brought up in England. I think he would have been better cast as the female lead's husband; and the actor playing her husband would be a better gang boss.
Rather difficult to accept that she had been on the take for such a length of time - long enough to have helped pay for her lovely house. Surely someone would have suspected her by now?