Airfield Construction Group WW2

[SeanD]

Good evening all,

I was wondering if you could please set my mind at rest on something ?

My father was a Staff Sergeant in the Royal Engineers 16th ACG and I have his badges set in a small display frame (just missing the war medal ribbon). The thing that is vexing me is that I do not know which way up the ACG insignia goes. Is it red, green or blue that is at the top ? The only image I have found is one from the Imperial War Museum and that shows red at the top. Can anyone please confirm if this is correct ?

Thank you for your time.