[1][2] Brown's appearance was that of a City of London businessman of the time, wearing a bowler hat and pinstripe suit, and carrying an umbrella.
[2] One example of a London Underground poster showed a passenger peeling back tape placed on train windows:[2] On the train a fellow sits And pulls the window net to bits Because the view is somewhat dim, A fact which seems to bother him.
[2] Another example of a bus poster had him waving a white object:[3] Billy Brown's own highway Code For blackouts is "Stay off the Road".
Billy Brown was also a mascot on sorties over Berlin during the war, with the advice "I trust it suffers no deflection, this stuff is for the Hun's correction" (i.e. Adolf Hitler.).
The Daily Mail later quoted:[5] Some day pretty soon, by heck, Billy Brown, I'll wring your neck.