Hi Kempres,
This is an extract from an article that I had published in the 2011 C&C magazine issue 4. It details all those airmen that were buried in Achiet-le-Grand CWCC, as was Colin Roy Mackenzzie.
The first member of the RNAS to loose his life and be buried in Achiet-le-Grand was Flight Cdr. Colin Roy Mackenzie D.S.O. the commander of A Flight from 8 Sqn RNAS. On Wednesday 24/01/1917 he had left his aerodrome at Vert Galand on an offensive patrol in the Bapaume area, flying Sopwith Pup serial number N5198. He had left his airfield at 11.25 and was shot down near Achiet-le-Petit and was KIA. Hans von Keudell34 from Jasta 1, claimed his victory near Bihucourt at approx 12.10.
This was
Hans von Keudell's eleventh of twelve victories.
Flight Cdr. C.R.Mackenzie was the son of A.L.Mackenzie and his wife Marion of No.6, The Circus, Bath, Somerset and was born on the 06/05/1892. He took his ‘Ticket' number 1571 at the Royal Naval Flying School Eastchurch on the 02/08/1915 while flying a Caudron Biplane. Flight Cdr. C.R.Mackenzie was 24 years old when he was KIA. He now lies at rest in grave Achiet le Grand Communal Cemetery, Grave number 3.
I hope tghat this adds to your information.
If you would like a copy of the complete article please let me know and I will forward it to you.
Happy Hunting
Joe M