Thanks for you comments . The Mk2 model has been started with a 10mm smaller rear wheels to start with, boiler to be slightly longer , smaller roller diameter at the front, different design of fuel tank and finally different colour scheme will be the main visible differences.
Yes it is a streamer and runs, probably a true stream roller travels very slowly. I don't have a video of it at the moment, may do that with Mk2. I took a couple of photos in the early stages but when I had so many false starts on making parts, I was more interested in getting remaking parts that photography. I MAY do a build log on Mk2 as I now know how to go about things and hopefully no remakes.
Barry