If your ancestor worked in the City of London before the war he might have signed up for the Stockbrokers Battalion.
Each record is a transcript.
The amount of information listed varies, but the Royal Fusiliers, Stockbrokers' Battalion 1914-1918 records usually include the following information about your ancestor:
There are 1,291 men recorded on the Royal Fusiliers, Stockbrokers' Battalion 1914-1918 records.
This was an independent unit (officially called the 10th Battalion), raised in the financial sector of London in 1914.
They landed in Boulogne in July 15 and they saw action in many famous battles including The Somme and Ypres.