PMQs: David Cameron's Daughter Nancy Cheers On Daddy In Raucous Exchanges With Ed Miliband

David Cameron must be glad he brought his family to what may be his last PMQs as prime minister.

Just after Cameron wrong-footed Ed Miliband by unexpectedly ruling out any increase in VAT if the Tories win the general election, his daughter Nancy stood up in the public gallery and shouted: "Yeah!"

As this article went live, the 11-year-old had not commented on whether the "yeah!" was because her dad had outmanoeuvred Miliband or because she felt a VAT hike could jeopardise the Tories' long-term economic plan.

She also did not comment on whether her intervention was the starting gun for her campaign to be elected in 2025 - the first at which she would be old enough to stand as an MP.

Her Twitter success means she is having a better work than her dad, after he was roundly mocked for announcing he would not serve as PM beyond 2020, while he still has the next election to fight.

In the absence of Miliband's two sons, Nancy Cameron appeared to have no one her own size to pick on, so her contribution appears to have ended there, although she quickly 'won' Twitter by earning her own #getnancyonthetvdebates hashtag.

Nancy's performance saw 'bring your child to work day' fever, or more accurately, 'oh no do I have to bring my child to work' day, grip Westminster's keenest observers.

Thankfully, someone spared a thought for the children whose parents do not belong to the London media-politico elite.

Nancy's 'Yeah!' comment made the public gallery almost as raucous as the Commons as Miliband and Cameron clashed over VAT.

Challenged by Miliband whether he would rule out a VAT rise, Cameron said: "Straight answers deserve straight questions and the answer's yes."

The Labour leader replied: "Nobody is going to believe him because of his extreme spending plans."

Cameron's commitment to not raising VAT, the day after George Osborne refused to give a "cast-iron guarantee" not to, is a blow to Labour who had preparing to fight the election by claiming the Tories would raise the tax.

In the Commons, Cameron then repeatedly challenged Miliband to rule out a VAT increase under a Labour government - which he didn't do.

Miliband sought to deflect the question, saying: "He'll have plenty of time to ask questions after May 7."

Miliband's sons Daniel, five, and Samuel, four, could not be reached for comment.

If Labour loses, they will likely never attend a PMQs where their dad is party leader, as his resignation as would be overwhelmingly likely.

Still, they could focus instead on winning seats in the Commons at the 2030 election, five years after Nancy will, evidently, do so.