On board 4024 where the seats alongside the interior cab entrance door have been cordoned off with these sturdy looking gates put into place. In most cases it seems that the trains have been marshalled so that the “A” end is at the driving end and it is that end that this change has been made. The “B” end is at the inner end of both units of a double unit. (Photograph by Trevor Hall, 26th March 2021)