I contacted public health england and while im waiting for a reply they sent the following advice:
The Government has now introduced the following measures:
1. Requiring people to stay at home, except for very limited purposes
2. Closing non-essential shops and community spaces
3. Stopping all gatherings of more than two people in public
Every citizen must comply with these new measures. The relevant authorities, including the police, will be
given the powers to enforce them – including through fines and dispersing gatherings.
These measures are effective immediately. The Government will look again at these measures in three
weeks, and relax them if the evidence shows this is possible.
You should only leave the house for one of four reasons:
a. Shopping for basic necessities, for example food and medicine, which must be as infrequent as possible
b. One form of exercise a day, for example a run, walk, or cycle - alone or with members of your household
c. Any medical need, or to provide care or to help a vulnerable person
d. Travelling to and from work, but only where this absolutely cannot be done from home
These four reasons are exceptions - even when doing these activities, you should be minimising time spent outside of the home and ensuring you are 2 metres apart from anyone outside of your household. These measures must be followed by everyone. If you work in a critical sector or your child has been identified as vulnerable, you can continue to take your children to school.