Pupils from several London schools will be trying their hand at market trading today, selling fruit and vegetables they've grown themselves.
They'll be joining stall-holders at Borough Market in south London to trade their pumpkins, squashes and beetroot for hard cash.
All of the proceeds will go to FareShare, a charity that works to relieve food poverty.
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Kurt Cochran and his wife Melissa had been visiting London from the US to celebrate their 25th wedding anniversary and were due to fly home.
Rail union RMT have slammed the move saying the company MTR is set to make "a killing at the British taxpayers' expense".
The meeting was arranged in the wake of Wednesday's terrorist murder of four people in Westminster.