Only units that I photographed recorded Class 20s had pair KFA wagons sandwiched between them. 180108 with 1W29 Paddington to Great Malvern 43098 and 43010 with 1P39 Oxford to Paddington 166220 on 2P43 Reading to Paddington
20142
180108 with 1W29
43098 and 43010 with 1P39
166220 with 2P43