Government advice, can be found by following the link at the top of the page
1. When am I allowed to leave the house?
You should only leave the house for very limited purposes:
shopping for basic necessities, for example food and medicine, which must be as infrequent as possible
one form of exercise a day, for example a run, walk, or cycle - alone or with members of your household
any medical need, including to donate blood, avoid or escape risk of injury or harm, or to provide care or to help a vulnerable person
travelling for work purposes, but only where you cannot work from home