If you can work from home, please continue to do so. If you cannot work from home, you may go out to work, following social distancing guidance where possible.
If you are employed, check with your employer about how to manage going in safely. There is detailed guidance for employers, sector by sector, HERE.
If your work involves working in someone else's home (cleaner, nanny, tradesperson) there is detailed guidance HERE. Clearly, nannies and childminders cannot keep a distance from the children in their care, but should try to limit contact with other household members.
The Government advice is to avoid public transport if you can, and there is more detailed guidance on travel HERE.