For most people any potential infection from coronavirus will not be because of their work.
If you do not normally wear a face mask, or any other PPE for work, then you do not need to because of coronavirus.
There is currently no evidence that using face masks outside of a healthcare or clinical setting will protect people from coronavirus.
Face coverings do not need to be worn in the workplace but employers should support their workers if they choose to wear one. You can find more on face coverings in the GOV.UK guides on Working safely during coronavirus.