Batman palace intruder Jason Hatch planned yesterday’s stunt to get the group back in the headlines.
Hatch is one of the most active members of Fathers 4 Justice and is driven by a burning sense of grievance.
The 32-year-old painter and decorator is currently on police bail for a string of stunts carried out across the country in the name of the group.
He was a member of a quartet who scaled Bristol’s Clifton Suspension Bridge in February, he has taken part in roof-top protests at courts in Cheltenham, Gloucester and Worcester and at York Minster.
Following the break-up of his second relationship Hatch claims his ex-wife denied him access to his son and daughter, aged five and six.
Hatch, who lives in Cheltenham, says he has seen his two children just three times in the last three years. They live with their mother close to his home.
A legal battle ensued after his ex-wife accused him of harassing her.
Fathers 4 Justice Bristol co-ordinator Jeff Skinner said he knew Hatch did not have a “squeaky clean” past.
He said: “I am aware he is not whiter than white, but that should not affect his rights to see his children.
“Convictions should not have a bearing on his ability to be a good father.”
It is understood he changed his name from Jason Tunnicliff to Jason Hatch to protect the identity of his children.
Hatch has now been granted one supervised visit every three months, but friends say his ex-wife refuses to comply.
Last night, his former wife refused to comment.
Hatch, who is national co-ordinator for the campaign group, also has a daughter from his current relationship and another son from his first relationship.
The raid on the palace was planned at a Fathers 4 Justice summit at the Stretton Hall Hotel in Church Stretton, Shropshire, last weekend.
Mr Skinner said: “Buckingham Palace has been looked at for a number of months. But it was all decided last weekend.”
He said the campaign group planned the stunt to coincide with the court appearance of Ron Davis over the flour bomb attack on Tony Blair in the House of Commons in May.
He said: “The plan was to push us back into the headlines.”
Hatch’s father Roger Tunnicliff, 61, of Bishop’s Cleeve, Gloucestershire, said he supported his son’s actions.
“I hope he makes a difference. He’s doing it for a lot of other people. But I’m afraid he might be facing a prison sentence on this one,” he told the Daily Mail.