Hi Peter60 - you aren't brave if you don't know what you've missed because you can't see anything, although the accolade is appreciated.
I spent some time a while back honing my map and compass skills in the ranges of West Dartmoor. Very few features at all to help on the open moor, so I'm quite confident with those tools now.
Actually I did have a bit of a go at Ordnance Survey about the Plynlimon area, because the Cambrian Way takes a route that goes from one map to another then another in about half an mile or so on the 1:25000 (if I remember correctly), with no overlap at all. I bought the middle map which comes out for about 10 minutes before you walk off it, but I know someone who decided to 'wing it', which I thought was a little dangerous so asked OS to provide a bit of overlap. They agreed to consider it although they pointed out that the Cambrian Way is not an official path.
S.