Hi Andy. Eventually found the little sod! It wasn't in the newsletter, but in the Hannant's Future Releases section of their web-site!
It's from AZ Models, an injection kit, 1/48th scale Vultee Vengeance Mk1.
The Hannant's code is AZM48013.
I'm afraid that the expected delivery date or price aren't shown, but I guess it'll be about the same as their Firefly, about £35 (!!).