Over and out.

Another local landmark, but a tricky one to photograph without getting your shadow in, it seems!
Windmill Lane Bridge is a unique example of a bridge where three modes of transport are directly superimposed on each other.
Known locally as Three Bridges, it was part of the last railway project engineered by Isambard Kingdom Brunel. Work began in 1856 to carry both a road and the canal over the Great Western and Brentford Railway in a deep cutting at the same point; so that the line of the railway would avoid violating Osterley Park.
No such consideration seems to have been taken with the route of the M4.