I don't know why "The Big Bopper" album by Gareth Marks is not appearing in any of queenzoners or fan club discography (only ultimatequeen mentions it)...
It's time to fill the gap, as Gareth Marks internet site provides us the album description plus "Go bopper go" and "Bopper's boogie woogie" files, 2 songs featuring a lovely lead guitar by Brian. link