[Talk-GB] Tagging ad hoc parking places?

[Martin Wynne]

If you enjoy country walking off the beaten track, it's often difficult 
to find somewhere to leave the car for several hours without it getting 
in anyone's way. Country lanes can be narrow with passing places or 
field gates which would be obstructed if a car is left there for long 
periods.

So it's great to find unofficial parking places such as these -- wide 
verges with solid ground, unused corners at junctions, odd bits of 
unused land, etc.

  https://goo.gl/maps/XrjmrV8eSgRr76U49

  https://goo.gl/maps/cM4HZycSEvWiCHCNA

It would be even better to be able to locate them on a map in advance.

But how to tag them? It's hardly a Car Park. Nor a Lay-By in the usual 
sense -- even if it is, highway=layby appears to be an abandoned proposal:

  https://wiki.openstreetmap.org/wiki/Proposed_features/Lay-by

Thanks.

Martin.