Slingsby sold jigs and production rights of their T.53 upon Slingsby’s 1969 receivership to Yorkshire Sailplane which produced an improved version with both nose and centre of gravity tow hooks known as the YS 53 Sovereign.
Yorkshire Sailplanes only turned out three of these all-metal two-seaters, conceived as a T31 replacement for the Air Training Corps only to be rejected due to unpleasant spinning characteristics.
All Aero 