As police approached the detached house, they noticed a man placing large bags inside a wheelie bin. He then ran off into Crystal Palace Park.
Sergeant Rob Goodwin from Bromley Police said: “This seizure represents a major and unexpected dent in the network of cannabis supply in the South East London area and was brought about through proactive local neighbourhood policing”.
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By law, the Met Police has a duty to police public land outside grounds - that's costing them £9.3m a season.
John, who began running for Age UK back in the 1980s when he was aged 53, has raised an incredible amount since then - more than £40,000.