Hi,
I love the layout, I saw it in Model Rail Magazine and thought it was fantastic. I am from Edinburgh and have always wondered how to do the Waverley in model form. Now I don't have too.
I now that you have set the layout in the 80's and I didn't to be picky, but I thought that my observations might be useful. The taxi's you have all look correct but I noticed the one coming up the station ramp has advertising on the side. This didn't happen until the early 90's. You could also make them look like Edinburgh cabs by adding the yellow cab plates on the grill and back of the cab. My Dad was a taxi driver during this period and I think I can find a picture or two to help if you want.
Please don't think my being too critical, because you have inspired me to try and model parts of the Edinburgh South Suburban railway.
Thanks for sharing the pictures,
Chris