 The regiment was re-raised by Viscount Bury on the formation of the Volunteer Force as the 21st Middlesex Middlesex Rifle Volunteers (Civil Service Rifles) in 1860.By 1880 and the re-numbering of London Rifle Volunteers the unit was titled 12th Middlesex (Civil Service) Rifle Volunteer Corps and were linked as a Volunteer Battalion of the King's Royal Rifle Corps.On formation of the Territorial Force in 1908 the Civil Service Rifles became part of the newly formed London Regiment and was titled 15th Battalion London Regiment (Civil Service Rifles).