Septimus Frederick Nicholson and Co

Standing is Septimus Frederick Nicholson. He joined the Shropshire Light Infantry, but after arrival in France he transferred to the South Wales Borderers. He was killed in action on Tuesday, 31 July 1917. He is remembered on the Ypres (Menin Gate) Memorial in Belgium, on Panel 22.

Q. Who are the soldiers seated?
Q. Are they the Shropshire Light Infantry or the South Wales Borderers?
Q. What are their Ranks?