Gwen and unknown soldier. Possibly her brother

This one shows Gwen and an unidentified soldier from the regiment.
It is not dated but she is wearing the same clothes as the one she sent to Roland with the date April 1918.
While I thought initially that this was perhaps Roland before he went overseas, I am thinking this might be her brother. Similar facial features.

In the group of 3 with her in the middle, I was thinking that Vic might be the one standing and Roland (not sure of hat badge) might be the one seated next to her.