ALLY SLOPER number 1 was published in September 1976 by Alan Class with Denis Gifford as editor. Frank Bellamy created "Swade", for the comic/magazine, a Wordless black and white 3 page strip. Unfortunately he died before being able to do a strip for the second issue (in which his obituary appeared).
I knew that Bellamy had been invited to the launch of Ally Sloper but Nancy, his widow, couldn't remenmber if he actually attended the event in London.
Terry Hooper has managed to interview Alan Class and he kindly put the question to Alan regarding Bellamy's appearance.
I'll leave you to read the full article which includes reference to the launch aboard "the Steam-ship “Tattershall Castle”,which was berthed on the Thames near Blackfriars Bridge". The master-of-ceremonies was, apparently, the comedian Ted Ray - a name I haven't heard for ages.
Read the full interview at Terry's site http://www.comicbitsonline.com/2007/08/04/exclusive-an-interview-with-alan-class/