This is F Company of the Scottish 6th Rifles taken in Falkirk in October 1914. One of four Territorial Battalions of the Regiment, the 6th Scottish Rifles covered Lanarkshire and had its headquarters in Hamilton.
The officer seated in the centre with a mousache is James Brown the School Teacher from Blantyre, killed in action in Festubert on 15th June 1915.
There are likely many young men in this photo from Blantyre. With thanks to Alex Rochead for the photos and documentation.