Newcastle Falcons consultant director of rugby Steve Diamond says the sport's disciplinary process "is flawed" as he begins a six-match ban against Northampton Saints on Friday.

Diamond, 56, was given the suspension for abusing match officials at the end of a 17-15 defeat at Exeter Chiefs on 29 March.

He was upset about Exeter's match-winning try in the last minute being awarded and angrily confronted the officials after the game.

Diamond admitted the charge, describing the incident as a "huge mistake", but says more experienced officials may be needed.

He said: "There's a problem with the disciplinary system, not a problem with the referees. There's only people like me prepared to say things about it, but it's not the first time these things have happened.

"I've got a six-week ban for saying an inappropriate comment - which I've apologised for - to a professional referee in complete privacy.

"If the ref can't pick it up, because he can't see everything and the assistant can't see everything, surely for goodness sake the TMO [television match official] should be seeing these things?

"The system is flawed. Maybe they need some more investment and more experienced people doing these jobs.

"There's no accountability. We understand we have to have regulation and understand I can't say what I said, but there's got to be some accountability otherwise people keep making mistakes."