These toys were sold by British Home Stores, 1987-1988. They were 16-wheel drive vehicles in four different variants: Ocean, Polar, Terrain and Space. There was also a base station and numerous trailers that you could buy to attach to the main vehicles, which would increase the drive wheels by a further six, as they were all linked by cogs hidden down the side of the vehicle. The Explorer 12 could only go forwards and have forward-facing lights. Other accessories included blister packets of small vehicle occupants, comic books, patches for cloths, school bags, PJs, jumpers etc. Bhs only promoted them for a couple of months, then like many toys from my childhood they just disappeared.