... they are the only historic maps currently available GB-wide, and available on subscription from the tile server. The NLS 25-inch project has not yet covered the whole of GB (and may never do so for all areas), and the maps are not currently available on subscription, so cannot be directly loaded in Templot -- you must make your own screenshots from the NLS web site. Here is a direct comparison between the two (Tewkesbury): 6-inch map: 2_312108_120000002.png 25-inch map: 2_312108_110000001.png Clearly the 6-inch map is not going to be much help in the finer track details (or even the exact number of sidings), but it does show the ruling radii, correct positions of bridges, goods sheds, signal boxes, etc. So it is still useful, and could be used to correctly scale a 25-inch map over the top of it if the latter is set to transparent. Talking of which, I have also included a function to perform the scaling for manually created screenshots, ...