On the Saturday of May day bank holiday weekend 20215 and 20142 worked the 1037 Skegness - Sheffield where they are seen on 6 May 1991
The Saturday 1038 Skeg - Sheff was class 20 hauled on occasions during
summer 1991 - such as on 11 May when 20094 and 20019 worked.
On 8 June it was 20087 and 20058, pictured after arrival at Sheffield.
20071 and 20135 at Nottingham on the outward working, the 0957 Sheffield - Skegness at Nottingham on 13 July 1991.
These are not class 20s and they are not on the Sheffield train, but I didn't know where else to put this photo and it is a train from Skeg! 31301 and 31149 at Leeds on 6 July 1991 having arrived on the 1021 from Skegness.