©  London News Pictures 05/05/2011. The A501 Euston Road Underpass is closed westbound due to an traffic incident. 05/05/2011  Westbound traffic at Euston Underpass is being diverted via Gower Street causing heavy congestion around the surrounding roads. A white box van involved in the incident remains on the westbound lane of the Euston Underpass, both westbound entrance and exit ramps are covered with fuel or oil, the underpass remains closed. Photo Credit should read: Simon Lamrock/LNP