Dave-Mole posted something on facebook which would indicate that the police do not actually have the authority (yet) to stop people driving somewhere to exercise.

I'm not posting an opinion either way, there's too many armchair experts. But i think people need to just be reasonable, and what is necessary and essential to one person, may appear totally unnecessary to another.

I know of 'someone' who drove a fair distance today to pick up some sporting equipment. Was that necessary? On the face of it , no... but that now means the person in question can now get their daily exercise without leaving the garage, thus reducing their contact with the outside world, and their parents of OAP age also now have an option to do some gentle exercise away from public eye.