This train would have just worked a northbound passenger service from London St Pancras (it having been based at Kentish Town depot in London during that era)

The Jubilee class were designed to haul seven or eight carriages, a relatively light load. Apparently, they performed well on lines running through undulating terrain (but not ideal for heavy trains on the steep gradients); the Midland Main Line south of Sheffield suited them well in this respect. During 1961 Jubilee express-passenger rosters through Sheffield were dieselized, although members of the class continued to visit in declining numbers for several years (see v00566)

The following two observations are personal communications from John a retired engine-driver of Grimesthorpe shed, who had been familiar with the class.

He observed that the Jubilees were Good, very forgiving which accords with the notion that for short periods a Jubilee could tolerate being thrashed. He used the name 5X for the Jubilees - an early name for the class. The London, Midland and Scottish Railway officially named the class 5XP (five being the power rating, always an important consideration in these matters and XP, meaning designed for express services). When British Railways changed this designation to 6P5F in the early 1950s, it is interesting that the class kept this earlier name, informally at least).

Information from J Thickitt