When the Volunteers were subsumed into the new Territorial Force (TF) on 1 May 1908 under the Haldane Reforms, the  1st City of London Artillery split to form three brigades in the Royal Field Artillery: I City of London Brigade in the City of London, VI County of London Brigade at Brixton in South London, and VII County of London Brigade at Wood Lane, Shepherd's Bush, in West London.
The VII (or 7th) London Brigade was formed on 1 May 1908 from Nos  8–10 Companies of the 1st City Artillery, descended from part of the 1st Surrey Artillery Volunteers, which had been absorbed by the City of London Artillery in 1883.
The commanding officer (CO) was Lieutenant-Colonel Charles Chambers, VD, who had previously commanded the 1st City Artillery.

The new unit had the following organisation:
18th County of London Battery
19th County of London Battery
20th County of London Battery
7th London Ammunition Column
Before 1914 the brigade (except 19th Bty) moved from Shepherd's Bush to 86 Fulham High Street.
The Brigade was assigned to 2nd London Division of the TF.
The three batteries were each equipped with four 15-pounder guns.
When the Volunteers were subsumed into the new Territorial Force (TF) on 1 May 1908 under the Haldane Reforms, the  1st City of London Artillery split to form three brigades in the Royal Field Artillery: I City of London Brigade in the City of London, VI County of London Brigade at Brixton in South London, and VII County of London Brigade at Wood Lane, Shepherd's Bush, in West London. The VII (or 7th) London Brigade was formed on 1 May 1908 from Nos  8–10 Companies of the 1st City Artillery, descended from part of the 1st Surrey Artillery Volunteers, which had been absorbed by the City of London Artillery in 1883. The commanding officer (CO) was Lieutenant-Colonel Charles Chambers, VD, who had previously commanded the 1st City Artillery.
The new unit had the following organisation:
18th County of London Battery
19th County of London Battery
20th County of London Battery
7th London Ammunition Column
Before 1914 the brigade (except 19th Bty) moved from Shepherd's Bush to 86 Fulham High Street. The Brigade was assigned to 2nd London Division of the TF. The three batteries were each equipped with four 15-pounder guns.
7th County of London Brigade, Royal Field Artillery