An enormous machete the length of an arm was discovered by a member of the public in Greenford on Wednesday (August 16) lunchtime.
They also branded the knife "ridiculous".
The discovery comes nearly a week after a Hounslow Police released a chilling picture of deadly knives they found.
Officers recovered the stash of six sharp weapons in Cromwell Road, less than a mile away from the town centre.
Among the deadly weapons there appears to be a small kitchen knife and what could be a machete.
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