The Lothians & Border Horse was a Yeomanry regiment of the British Territorial Army first formed in 1797.
The Commonwealth War Graves Commission has 52 recorded WW1 deaths for the Lothians & Border Horse.
SMART, Joseph. Private, 120586. "B" Squadron, 1st/1st. Lothians & Border Horse. Wimereux Communal Cemetery, Pas-de-Calais, France. 25-03-1917. Age 29. Son of Mr. & Mrs. Smart of Gilmerton Grange, Gilmerton, Mid Lothian, UK. Husband of Walterina T. Smart of Harehead, Pranshaws, Duns, Berwickshire, UK.