The Class 86 was an excellent mixed-traffic locomotive which was at home on all manner of traffic.
RES operated a small fleet comprising Class 86/2 and Class 86/4 locomotives on mail trains alongside Class 47/4s, Class 47/7s and Class 90s. They worked a variety of stowage, TPO and parcels trains as well as being loaned to InterCity for passenger duties.
The livery came about through a revision to Parcels Sector livery which was applied to Class 86s.
RES livery survived on some Class 86/4s long after EWS acquired the business. The EWS Class 86 fleet was frequently hired to passenger sectors as cover, which saw RES-liveried Class 86/4s working with Virgin Trainsliveried Mk.2f and Mk.3 stock on a regular basis.