90 Signals Unit


90 Signals was formed on 1 April 2006 by bringing together several existing Air Combat Service Support Units that were charged with communications related tasks. It has since grown further with the addition of 591 Signals Unit at RAF Digby and the 900+ personnel on the Unit are required to ensure delivery of Information Services whenever and wherever they are required. A significant percentage of the Unit is focused on support to expeditionary operations with a constant deployed presence in current operational theatres. 

Mission: ‘To support airpower through the delivery of assured information and communication services.’

Vision: ‘To Ensure 90 SU is manned, motivated, equipped, supported and trained to fulfil its Mission today, tomorrow and in the future.’


90 Signals Unit, RAF Leeming, Northallerton, DL7 9NJ.

Portrait of Group Captain Cooksley

Officer Commanding

Group Captain Cooksley

Group Captain Cooksley took command of 90 Signals Unit in 2007, having already served on the Unit twice before. His operational experience includes deployments to Sierra Leone in 2001, Afghanistan in 2007-2009 and Qatar in 2013 as the UK’s senior communications commander for the Middle East. Over the course of his RAF career he has worked extensively on operational communications planning and delivery, as well as introducing a number of new systems into service. He is also an enthusiastic STEM Ambassador.

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