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The Metropolitan Police Service's Royal Parks unit have said there has been a steady rise of illegal mushroom foragers over the last few years, with almost 80 people issued police warnings.

5 live's Lesley Ashmall went foraging with Adam Curtis, assistant manager at Richmond Park. He said mushrooms are a "very important" part of the park and an increase in foraging could "strip them out of the ecosystem".

"Please come and enjoy the park," he said - but warned that it is illegal to collect from any land "without a landowner's permission".

This clip is originally from 5 live Breakfast on December 27 2015.