An unexploded bomb found by workers in a Hounslow field led to gridlock on surrounding roads on Wednesday (August 3) morning.
Police were called to Chester Road Open Space, a recreation ground in Green Lane, Hounslow West, at 9.25am to reports of an unexploded shell.
A Met spokesman said the explosive device, which was discovered by builders working at the location, was made safe by officers and removed.
The discovery led to major road closures in the area, affecting the A30 Great South West Road and the A312 The Parkway, from Henlys Roundabout to Faggs Road, at the Hatton Cross junction.
Hounslow Police tweeted at 10.38am to say the road closures had been lifted, but warned drivers to expect delays as traffic returned to normal.
The playing field, also known as Green Lane Recreation Ground, is on the border with Cranford.