The hospital was formed in 1995, through the amalgamation of 217 (London) General Hospital, 257 (Southern) General Hospital, and 221 (Surrey) Field Ambulance, as
256 (London) Field Hospital. Later renamed ‘City of London’. As a result of
Army 2020, the unit became under the command of
2nd Medical Brigade, and was paired with 33 Field Hospital. Under the
Future Soldier programme, the hospital was renamed as the
256 (City of London and South East) Multi-Role Medical Regiment in 2023. The regiment will remain under 2nd Medical Group. ==Structure==