Ainscough's - Liebherr LTM - The Boss !
Not sure of the exact model, maybe an LTM 500.
Seen on the A5, Cannock, Staffordshire, England in March 1998 the crane is about to be rigged to lift the concrete sections of a railway over-bridge that was being replaced over a long weekend.
Maybe a viewer can confirm the exact model designation of M399 THG.
Picture added on 06 September 2013 at 06:14