For those who have not seen it, a length of straight track is spanned in the centre by a tram-shed; the double-deck tram runs up to the shed and disappears inside to emerge a moment later at the other end as a single-decker! The tram reaches the end of the track, reverses automatically and repeats the cycle in reverse. Phil explained the way he had arranged a trigger to retain the upper deck, which runs on concealed wheels on the roof of the lower saloon. A splendid moving display model, with an intriguing mystery action, it was alike fascinating to the sightseer at Stoneleigh and the aficionado at Alcester. Phil also showed the programmer controlling the sequence and, as an alternative, a very neat working driver's drum type controller, which could be switched into circuit for manual control.