Do ride on your own, stay on your own, go home on your own and keep social interactions down to the absolute minimum. if you do meet people along the way then observe the guidance on social distancing. In like with all other forms of exercise the only exception to the riding on your own rule is if you ride with other members of your household – partner, children, housemates/flatmates.
Don’t go out for a recreational/training ride on your bike more than once a day. Government advice is very explicit about this. While there are no rules about how long, or how far you should ride – beyond Michael Gove’s assertion that you should do no more than you would normally do. The advice on how often you should go outdoors to take exercise is VERY clear. Once.
This advice is an extract from a longer article on road.cc that you may read in full here