Paul Watson has been arrested and bailed after flour was thrown over a MP.
MP Judy Dunn, a family lawyer, was pelted with powder and heckled by other campaigners as she started to make her speech.
Jody Dunn
Ms Dunn described the protesters as "childish", adding: "These people do huge amounts of damage to their cause."
Watson is a member of the Fathers 4 Justice group campaigning for greater access rights to their children.
MP Judy Dunn, a family lawyer, was pelted with powder and heckled by other campaigners as she started to make her speech.

Jody Dunn
Ms Dunn described the protesters as "childish", adding: "These people do huge amounts of damage to their cause."
Watson is a member of the Fathers 4 Justice group campaigning for greater access rights to their children.
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