I have two made in the UK versions. Both from R.857 sets. One must be a very early one. Subsequent to my question I have figured out the third version was made in China. Im doing this on an iPad and the forum does not appear to lime images from this platform, probably a size thing so I will amuse myself by figuring out how to post images later. So in the meantime I will try to describe the differences. Two are visual differences and one is in the construction. My earlier version shows an unchromed radiator, square cut decals, a two piece underbody and a battery cover that needs a flat blade to access the battery. The later version has the more common chromed radiator die cut decals, one piece underbody and a battery cover with a tang, the words "pull to open" and a symbol I assume means it is battery operated. The second version also carries CE marks and a Britt Allcroft copyright script.