Hi Steven,
I wonder if the tall chap in the middle of the back row is a candidate. Really need to see if the sort of shadow above his pocket could be medal ribbons.
It's quite interesting that most men with previous military history found themselves promoted in the Service Bttns, yet Henry was a Private at the beginning and end. Some men chose the stay Private.
The CWGC Concentration Record
http://www.cwgc.org/find-war-dead/casualty/548466/TOWNSON,%20HENRY shows Henry was originally buried (probably in a shell hole) near the track leading east from Dantzig Alley, north of Bucket Trench. 62D.F.6.c.3.8.
http://digitalarchive.mcmaster.ca/islandora/object/macrepo%3A4038/-/collection There was a large group of 22nd Bttn men nearby in Bulgar Alley.
I have a theory that burial parties generally didn't travel up hill with their charges. As this area forms quite a steep slope, we could suggest that Henry had made good ground in the attack and may have reached his objectives. Hence he could have been killed in the German bombardment of the area after the Bttn had arrived. Be careful with my conjecture though.
Have a read of Charlie May's Diaries - To Fight Alongside Friends.
Welcome to the forum
Tim