High Quality Content by WIKIPEDIA articles! No. 41 (R) Squadron (also written as "No. XLI Squadron") of the Royal Air Force is currently the RAF`s Test and Evaluation Squadron ("TES"), based at RAF Coningsby, Lincolnshire. Its official title is "41(R) TES". The Squadron celebrates its 95th anniversary in 2011, and is one of the oldest RAF squadrons in existence.