A goalkeeper who butted a woman referee in a mass brawl during an amateur football match has been jailed.
Robert Bunn, 34, was convicted of deliberately attacking Jayne Cameron-McLane during a Sunday league match in Hull.
At the city's Magistrates Court he was jailed for six months for common assault.
The court was told Bunn had to be dragged from the pitch by teammates following the incident in April, which started after a last-minute free-kick was awarded.
Sentencing him on Thursday, District Judge Frederick Rutherford, said: "This was a vicious assault on a lady referee who is in a position
of total authority on the pitch during the course of the match.
"I am sure that you deliberately headbutted the referee."
During the two-day hearing, the court heard that trouble flared in the match between Odd Bottle FC and Cherokee FC.
As players and spectators joined in the fight, Bunn ran up the pitch and butted Mrs Cameron-McLane.
The mother-of-two suffered bruising to her left eye.
After the case she said: "Violence in football at any level is unacceptable and violence against match officials who do this on a voluntary basis is disgraceful.
"Players who assault officials should no longer be permitted to play competitive football.
"I will not be put off refereeing because of this one isolated incident."