2503 (County of Lincoln) Squadron RAuxAF Regiment is a Royal Auxiliary Air Force RAF Regiment reserve squadron based at RAF Waddington, in Lincolnshire.

[3] The squadron was formed on 1 July 1979 at RAF Scampton[4][5] to provide force protection to the Vulcans being maintained there at the time; in 1985, the squadron was moved to its current home to provide force sustainment for the regular RAF Regiment.

[2] The squadron was deployed to Iraq during the Iraq War as part of Operation Telic, and gunners from the squadron have also been deployed to Germany,[6][7] the Balkans, Kuwait and Afghanistan[8] as part of Operation Herrick.

[3] The squadron standard was presented on 6 December 2005, backdated to July of the previous year.

[4] In 2015, the squadron was tasked with assisting on an archaeological dig, searching for a lost spitfire.