71st (City of London) Yeomanry Signal Regiment is an Army Reserve regiment in the Royal Corps of Signals in the British Army.

The regiment forms part of 7th Signal Group, providing military communications for national operations.

[2] HQ Squadron converted to a communications role and was re-designated 265 (Kent and County of London Yeomanry) Squadron in 1970.

[2] In 2006, 47 (Middlesex Yeomanry) Signal Squadron transferred from 39th Signal Regiment (The Skinners).

[6] Also in 2014, under Army 2020, 47 (Middlesex Yeomanry) Signal Squadron (already part of the regiment) amalgamated with 41 (Princess Louise's Kensington) Signal Squadron (previously part of 38th (City of Sheffield) Signal Regiment) to form a new entity, 31 (Middlesex Yeomanry and Princess Louise's Kensington) Signal Squadron.