I am using a combination of a 1 liter plastic botle as a Roll-a-route on tarmac, a compas and Teasi satnav offroad, all footpath's are in the last one but no M roads.
It has 3 positions; walking-hiking, cycling-mountainbike and motorcycle-offroad.
There is a blieb at 100 yards and one at the turn.
Downside of the Teasi; bad screenview when there is sun, you don't have that problem in England

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