Hello Jon,
I originally came across the photo of the Wasp in the 7th Recce History.
Here is a link to photos of a WASP IIC similar to the one in the 7th Recce photo. It is based on a standard UC Carrier and not a T16. Sixty years is a long time ago, and veteran’s memories are not what they use to be. It may be that he is getting confused with the T16’s used to tow the eight 6 pounder guns in the anti-tank battery of 7th Recce’s HQ Squadron.
http://www.dana-nield.com/vimy/Wasp.asp