Hi Steve,
Thank you for the pm you sent me - for some reason I cannot find how to get back to it so I am responding by way of a post.
51st RTR was transferred to 25th Armoured Engineer Brigade when it was formed in December 1944.
While the two ARKs belonged to 51st RTR the Na75 crossing was 'Armagh' of 'A' Squadron, North Irish Horse, consequently
the triangle should be coloured red. The photograph of her does not show it being obscured my netting, however, without her name on the louvres, as often happened she was probally a replacement being deployed before there was time to add her name, turret markings, etcetera. As mentioned in my posting, having served in 'B' Squadron, I cannot recall her Troop. It was the practice of the NIH to carry names forward as tanks were replaced for whatever reason, The last tank I crewed 'Ballyrashane' a Mark V was the sixth Churchill to carry the name.
See:
http://northirishhorse.net/articles-2/Units/51stRTR-AEB.htmlFollow the link at the foot to the main Insignia article.
The drawing of 'Ballyrashane's insignia should be of assistance to you.
http://northirishhorse.net/galleries/artwork/Ballyrashane-Insignia.jpgCompliments on your great work. With best wishes to you and yours.
Gerry