AC Ace Bristol ex John Anstis

[Emjo]

In the book Ace Bristol Racing A competition history, on page 124 it writes that John Anstis won at Goodwood in September. However, despite extensive efforts I am unable to identify in the historical records any confirmation of this achievement. I believe the year was 1961 racing under registration number JA 5.
Any information or help would be most appreciated.
Thank you.

[Jam2]

I expect you have seen this
https://www.handh.co.uk/auction/lot/lot-53---1957-ac-ace-bristol/?lot=45455&sd=1
It suggests that the car only did one circuit race at Goodwood and came 4th