Grosvenor Challenge Trophy

This was first called the Grosvenor Cup in 1923, and renamed the Grosvenor Challenge Trophy in 1949. It was presented by  presented by Lord Edward Grosvenor to the winner of a light aircraft time trial competition and entries were initially restricted to British designs using aero engines of less than 150 horsepower. this trophy has been awarded since 1923. Until the Kings Cup race weekend was moved there, this trophy was customarily awarded at Shobdon.

https://en.wikipedia.org/wiki/Grosvenor_Cup

Report of the first Grosvenor Cup race held in 1923

Year	Location	Course Length Miles	Winning Pilot	Winning Navigator	Aircraft Type	Engine Type	Registration	Average Speed mph
1955	Fairwood Common	42.5	Miss Freydis Leaf	solo	Fairey Tipsy Traner 1		G-AWFT	95
1956				solo
1957	Baginton		WP Bowles	solo	M17 Monarch	dH Gypsy Major	G-AIDE	131.5
2013			Gordon Bellerby	David Lee	Grumann AA-5B		G-BFXW	117.75
2014	Popham	105	Martin Gosling	solo	Robin DR400	Lycoming 0-360 D2A @ 180 HP	G-GOSL	161.9
2015	Popham	105	Gordon Bellerby	David Lee	Robin DR401	Thielert Tae. 125-02-114. (Mt- Propellor MTV-6-A/187-129	G-GORD	144.1
2016	Popham	106	Derryn McMaster	Claire Carter	Robin R2160		FGAXC