From Autumn 1964 I present the very first issue of the Dan Dare club newsletter. It was produced by Eric MacKenzie (aged 15) and Andrew Skilleter (aged 16). Printed on foolscap paper - 2 pages only. Eric had had letter published in Eagle on 13/06/64 and 07/11/64 concerning his interest in Dan Dare and the newsletter.
While not the earliest comics fanzine produced this country I would say it is the earliest fanzine about a particular character.
My question is did Andrew Skilleter produce the illustrations on page 2? Let's hope he reads this and can let us know.