During August 1991, 59104 worked a series of specials on behalf of Railfreight Distribution to assess the suitability of the Class for 75 mph freightliner operation. The as yet unnamed 59104 approaches Culham on 2 August with an Eastleigh to Crewe Basford Hall test train, comprising a rake of weighted FFA & FGA flats. Didcot Power Station dominates the background.