The plaque on the site of the Bennie Railplane. It reads:
George Bennie (1892 - 1957). To commemorate George Bennie’s Railplane which was tested here on the 8th July 1930. The bullet-shaped carriage with a propeller at each end was reputed to be the forerunner of the modern monorail. It was suspended from a single rail on a 428ft long purpose-built test track 30ft above the former L.N.E.R. railway line, situated to the east of this plaque.