Hi!
There are five photos at least of the 15 pdr BLC in Russia of the year 1919, I found in runet recently.
1. In Siberia
http://siberia.for um24.ru/?1-7-0-00000016-000-0-0-135 4859144
2. In Far East.
http://www.photo-war.com/ru/archive s/album3366.htm
There are not any mentions about the Russian White Army operatons of this guns in Western books on the British artillery history.
Finally I have a question about 15 pdr BLC. What are the differences between
the modifications of the gun. AFAIK there were three variants of the gun - Mk.I, Mk.III, Mk.IV.
Our wifes are charged cannons! (the words from Russian folk song)!