I do not wish to start WP's equivalent of a Witch Hunt (by alleging socketpuppetry) but please would someone inform me what is the correct forum/mechanism for airing my belief that Brixton Busters is not really a new editor (entitled to a certain degree of latitude and a greater degree of assuming good faith) but has, instead, recently edited on English Wikipedia using a user account not called "Brixton Busters"?

Sure users may have a right to vanish - but do they have a right to then re-appear and continue their old biassed editing agenda while their mates attempt to pull the wool over people's eyes by alleging that the re-appeared editor is a "new editor"?