In reply to bouldery bits:
Wasn't the advice given, to restrict ones exercise to the village, town, or area of the city you live in?
To me this suggests that you could run around the block 100 times for 100km. But to do a 5k out and back, might take you out of the area, so break the guidelines.
But, as they are guidelines, not laws, there is some flexibility on the part of the cops. Chances are they are not going to be out patrolling the muddy footpaths. I'd also argue that if you can get there on foot, it's probably local.