Wrap, the anti-waste charity, will launch the drive on social media next month and will focus first on potatoes - five million of which are discarded every day.

He then immediately pledged $300,000 of personal funds, an amount equal to one-half of the projected building costs, to launch that drive.

As well as allowing them to vote, the union launched a drive to encourage the lapsed members to rejoin, but only 12,000 had so far re-subscribed.

He launched his drives straight over it, leaving a flick to the green.

The trust, which has launched a drive to cut refined sugar by 20 per cent, replaced the traditional recipe with one that contains pumpkin, sunflower and poppy seeds.