The Ministry of Defence Guard Service (MGS) is the uniformed, unarmed element forming part of the larger Ministry of Defence Police and Guarding Agency. The MGS provide an unarmed guarding service to Defence personnel and property.
There is one recorded instance since 2003 where the Ministry of Defence Guard Service have directly replaced the Ministry of Defence Police at a Defence establishment. This was at DSDA Longtown, Cumbria, in 2004.