Tubby Clayton and two Great War VCs

I bought this old press photo from 1926 recently. The caption on the reverse reads:

YPRES DAY MEMORIAL SERVICE.
Our photograph shows the Rev. P.B. Clayton ("Tubby" of Toc H) leading the singing of Kipling's Recessional during the service in Horse Guards Parade, after which there was a procession to the Cenotaph. On the left are two VCs. Lt-Col Sherwood Kelly and Sergt Brooks.

John (Jack) Sherwood Kelly VC, CMG, DSO won his Victoria Cross on the 20th November 1917 at the Battle of Cambrai. Oliver (Olly) Brooks of the Coldstream Guards won his VC near Loos on the 8th October 1915.