U Class No. 31632 leaves Broadstone with a Poole/Bournemouth-bound passenger service of five carriages. There is currently no date available for this image, but 31632 is shown as allocated to Bournemouth/Eastleigh until Feburary/March 1960.
On this basis, leading carriage set no. 853, from the listing by the Southern Railway Email Group, would be a three-carriage set assembled in 1954.