| Unit Name: | 40th (Ulster) Signal Regiment (Volunteers) |
| Dates: | 1967-2010 |
| Branch: | Territorial Army |
| Type: | Royal Corps of Signals |
| Command Structure: | 2 (National Communications) Signal Brigade 38 (Irish) Brigade |
| Role: | National Communications Regional ICP Support |
| Size: | 3 Squadrons |
| Commander1: | The Princess Royal |
| Commander1 Label: | Colonel in Chief |
| Commander2: | Lord Rogan |
| Commander2 Label: | Honorary Colonel |
| Motto: | Certa Cito (“Swift and Sure”) |
| March: | Quick - Begone Dull Care Slow - HRH (Princess Royal) |
| Colours: | Sky Blue, Navy and Green (Air, Sea and Land) |
| Identification Symbol Label: | Tactical Recognition Flash |
| Mascot: | Mercury (“Jimmy”) |
40 (Ulster) Signal Regiment (Volunteers) was a Territorial Army regiment in the Royal Corps of Signals in the British Army. The regiment formed part of 2 (National Communications) Signal Brigade, providing military communications for national operations. The regiment did not have an internal security role in Northern Ireland.
The Regiment was formed 1 April 1967 in Belfast by the amalgamation of 66 Signal Regiment (TA), 81 Signal Regiment (AER) and 302 Signal Squadron.[1] Due to the reduction in Territorial Army Royal Signals units, as a result of the Strategic Review of Reserves,[2] the regiment was disbanded on 31 March 2010. 66 Squadron and 69 Squadron were transferred to the command of 32 Signal Regiment.[3]
The structure in 2010 was as follows:[3]