Police discovered a 17 inch blade during a weapons sweep in Sydenham.

Officers uncovered the blade in Allwood Close on Saturday (July 4).

MORE TOP STORIES The Sydenham Safer Neighbourhoods Team, who found what appears to be a kitchen knife, needed two rulers to capture its length in a photograph.

Lewisham MPS tweeted the photo of the weapon with the caption '#saving lives'.

More to follow.