Going through this thread - from " Oldfart's " Inquiry.
These photos from Graeme Kennish archives - Allan Dick had posted them and indicated it was 1964.
From comments here It seems that the track was used in 1962 - 1963.
Jaguar and Zephyr .. Alistair McBeath #66 and Sprague had #51 in 1962
Small Saloon Car field, Austin A40's, a VW, Anglia's, Mini's. - 1962 - [ not as noted on the photo- to be corrected ].
J Murphy in his Anglia #34 - attacking the Haybales. He is entered in 1963 as #34 Anglia with a 1640cc engine
Need to check the details against the Entry Lists from GD66 and Milan Fistonic copied below
December 1962 - the last weekend of the year which became the traditional date for the Big Baypark meeting.
December 1963
I have a couple of Newspaper /Motorman articles which I show as being 1964 .. buy guess published in January 1964 about the December 28th, 1963 Event ??