Hello All, I'm fairly new to all this so I apologize if this isn't the correct forum for this type of question. I recently came across the two photograph post cards attached below. I'm pretty sure that they're of a British Cavalry Regiment of some type. On the reverse of the trooper on horseback card it says "Tom, taken at Clacton in 1914 in training", The other simply "A great war picture". The troopers in each have the same insignia on their caps shoulders "NDH". Can anyone shed a little more light on their unit etc.etc..