Year and date this article was written?

The Automobilia magazine is only available in French, but worth learning that language.

is this"Automobilia" magazine a French only or is an English version available,thank rod

I'd suggest 1948 as the business in Grantham appears to have been bought by Hartnett in 1949. See this article: https://en.wikipedia.org/wiki/Hartnett_(car). There is also this site
https://www.worldcat.org/search?q=aluminium+francais+gregoire&qt=notfound_page&search=Search
which lists some articles from "Automobilia"
Good luck.

Automobilistes nº29 september 1998
Regards

It appeared in Automobilia No 29 from September 1998.