A FIERCE row has split the pressure group Fathers 4 Justice.
Yorkshire members are poised to form a breakaway group.
They are furious they weren't invited to help storm York Minster at the weekend.
London dads staged the stunt in secret - bringing in friends from Liverpool and Manchester.
But Yorkshire activists, including Huddersfield members, were left in the dark.
Paul Midgley, who has been Yorkshire co-ordinator, said: "I take it as a personal snub.
"Now I'm asking all our members in the county whether they want to form a new group or stick with F4J."
The new organisation is set to have the name Fathers 4 Equality.
Mr Midgley, a father of twins, says: "We were planning our own assault on the Minster.
"We thought we'd climb up on to the roof and stay there for a week. But centrally, F4J got wind of it and they stole our thunder."
Another gripe is that Yorkshire members have not been handed copies of the group's suggested blueprint for family law which has already gone out to politicans.
"We've been invited to buy copies at £5 each," says Mr Midgley. "And it's just not right.
"We pay our subscriptions of at least £2 a month and we're concerned about what the money is being spent on.
"It should be available to those who need it."
He continued: "We developed our own campaign featuring the Purple Pimpernel but that's been ignored nationally. We've had enough of it."
Disgruntled northern dads from further afield than Yorkshire are also expected to break away from F4J.
Mr Midgley said: "We want to be more militant. Dressing up in silly suits is one thing but it's run its course."
Parliamentary co-ordinator for F4J, Gary Birch, said: "If Paul has decided to leave I wish him well."