Two classic forms of traction pass each other at speed at West Drayton on 6 November 1986. 50011 Centurion is heading for London with the 1F27 09:40 Oxford to Paddington Network SouthEast service, while 43147 brings up the rear of the 1B24 10:27 Paddington to Great Malvern 'Cotswold & Malvern Express' HST. Centurion had less than four months left in traffic when this picture was taken, becoming the first Class 50 to be withdrawn, when it was switched of for the last time in February 1987.