Malc, Alan is correct. The answer lies in the mane and head angle. In the RWK and 20th London badge, the mane sweeps across the shoulder and the head angle is almost horizontal. On the WK Yeo and WK cyclists the mane is shorter and the heads are looking more of a 45% angle upwards. I have some pikkys for comparison.
kent yeo.jpgcyclists.jpg
WK Yeo & WK cyclists
RWK.jpg20th london.jpg
RWK Regt & 20th London Regt
Regards, Garry