text: There are two iterations of woodland here, one overlaying the other.
  The original goes back to 2009 and covers the whole area in one polygon however in 2014 we had an import of OS OpenData which divided the wood up into many polygons.
  I suspect that the latter implicitly indicates where the paths are.
  We need to get rid of the second iteration and at the same time map the paths but that's going to need a survey on the ground with a GPS so it'll have to wait until the weather is nicer.