Bad (though hardly disastrous) news on the "free mapping" front
No Change for Walkers' Maps as OS Frees Data
So it looks like we'll have to continue to stump up the minimal fee each month.
As for the cut-down "VectorMap District", it sounds very much like the kind of data that's already available through
OpenStreetMap. Hopefully the attitude to walker-submitted footpath data will be similarly relaxed.