HMGCC used to have a communications centre at Signal Hill near Gawcott, in Buckinghamshire. Stephen Ball was Chief Executive until 2000, when Dr John Widdowson took over; Widdowson moved to GCHQ in 2005.
Previously, HMGCC operated with a communications hub at Signal Hill near Gawcott, Buckinghamshire. Stephen Ball served as the Chief Executive until 2000, after which Dr John Widdowson succeeded him; Widdowson transferred to GCHQ in 2005.