5th City of The London Regiment (London Rifle Brigade) cap badge, King's crown, after WWI

The London Rifle Brigade was a volunteer unit of the British Army.
The regiment was first raised in the City of London on 14 December 1859 as 1st London (City of London Volunteer Rifle Brigade) Rifle Volunteer Corps, a rifle volunteer unit made up of five companies.
In December 1891, it was renamed the 1st London Volunteer Rifle Corps (City of London Volunteer Rifle Brigade).
In 1908 the unit was again renamed, becoming the 5th (City of London) Battalion of the new London Regiment.
In 1922 it was renamed again as 5th City of The London Regiment (London Rifle Brigade).
In 1937 renamed as London Rifle Brigade, The Rifle Brigade (Prince Consort's Own).
On 1 May 1960 it amalgamated with The Rangers, with the new unit going under the name London Rifle Brigade/Rangers, whose successor unit is G (Royal Green Jackets) Company of the current London Regiment.