Why, I wonder, are the boundaries quite so complex?

Anyway, there I was half way through and beginning to wonder WTF was going on 'cos my boundary looked increasingly different from the small scale drawing on the NTM when I realised I was plotting the Lat and Long to the Long and Lat on the chart! I've spent 40 odd years working with the OS National Grid where coordinates are given as Eastings then Northings and without even thinking about it started plotting the first coordinate (lat) on the horizontal and the second (long) on the vertical. Doh!

Having sorted that little upcock out (it only wasted about an hour), it was interesting to find that the boundary defined by the list of coordinates differs somewhat from the boundary drawn on the accompanying chart.

Bru