The new Yorkshire co-ordinator of the Fathers 4 Justice campaign today vowed: "There's more to follow Batman at Buckingham Palace."

Martin Cottrell, a former Bradford university computer graduate, was one of the group's high command which plotted the London stunt.

On Monday, campaigner Jason Hatch was brought down after five hours on a ledge next to the Queen's balcony. Police admitted the security breach was "embarrassing".

Today Mr Cottrell warned more protests were in the pipeline.

He said: "We have a lot of projects in hand. Absolutely."

On Tuesday, the group is holding a meeting at the Shoulder of Mutton pub, in Kirkgate, Bradford, starting at 7.30 pm, to offer support for fathers fighting to see their children.

Mr Cottrell, 43, whose problems with access to his own son are now resolved, said: "Buckingham Palace shows how desperate fathers have to be to highlight the injustices in family courts. The only family that family law looks after is the family of lawyers.

"The stories are tragic. We have cases where fathers have not seen their children for years. There has to be equality and fathers only get residency in two per cent of cases."

He said the Labour party was now the group's top target. Earlier this year campaigners breached House of Commons security to throw purple powder at the Prime Minister at question time. Mr Cottrell said the palace stunt had been planned with other regional organisers who met at a pub in Shropshire. "It wasn't my idea, but I wished it had been," he said.

He said the campaigners want fairer laws to balance the rights of parents. And he said the palace was targeted because the royal crest is always on show in courtrooms where decisions about access to children are made. Mr Cottrell was involved in a water-throwing incident at the headquarters of the Child and Family Courts Advisory Support Service in Manor Row earlier this year. He also joined the climb up York Minster where the sign "In the name of the Father" was unfurled.

He defended protesters' actions saying they are acting responsibly. "The whole campaign is to perform high-publicity stunts with humour. We do them only because we are desperate," he said.

l Top Leeds divorce lawyer Marilyn Stowe has changed her mind about the issue. After writing an article criticising the campaigners, she now believes estranged fathers do not get a fair deal. She said: "Men who had practised what successive governments had preached - taking an active, sharing role in the upbringing of children - are suddenly finding themselves expunged from the daily lives of their offspring."