This isn't the first time that members of Fathers4Justice have broken the law in order to advocate for men separated from their children. In 2004 and 2005, members hurled packages of flour in parliament at then Prime Minister Tony Blair and climbed Buckingham Palace and the Foreign Office while dressed in superhero costumes.
The oil portrait is 9 by 11 feet and was painted by Australian artist Ralph Heimans, who says he wanted to capture "a sense of tenderness and soulfulness" but also depict the Queen's "inner strength." Heimans sat with the queen at Buckingham Palace, but the portrait portrays her standing on the same spot in the abbey where every English monarch has been crowned since the 13th century.
It had gone on display only last month in the Sacrarium of Westminster Abbey, also known as the Coronation Theatre. It was supposed to remain open to the public until September.
"Until work can be done to remedy the damage it will -- very regrettably -- not be possible to have the painting on public view," Westminster Abbey said in a statement.