Photo:
Tony Lyster - Turntable in store in Up Yard

This 60ft long vacuum-operated turntable came from Hitchin, arriving at Quainton on the 3rd June 1978. The last steam locomotive reported to have been turned on this turntable was 7029 Clun Castle in 1964 when running tours out of Kings Cross. It was intended that it would be installed in the Up Yard, probably between the Weighbridge Hut and Rewley Road Visitor Centre.

References:
Society Notes - Quainton News No. 35 - Summer 1978
The Hitchin Turntable - Roy Miller - Quainton News No. 37 - Winter 1978 / 9