FAO Danidl - see para 6. (2) (f) - anything else from the Gov., Police etc is only `advisory`. ROI of course is different...you CAN be prosecuted for going to work, that is the entire point of the lockdown and the list of essential occupations and functions.
The Health Protection (Coronavirus, Restrictions) (England) Regulations 2020
These Regulations require the closure of businesses selling food or drink for consumption on the premises, and businesses listed in Part 2 of Schedule 2, to protect against the risks to public health arising from coronavirus, except for limited permitted uses. Restrictions are imposed on...
www.legislation.gov.uk
Statutory Instruments
2020 No. 350
Public Health, England
The Health Protection (Coronavirus, Restrictions) (England) Regulations 2020
Restrictions on movement
6.—(1) During the emergency period, no person may leave the place where they are living without reasonable excuse.
(2) For the purposes of paragraph (1), a reasonable excuse includes the need—
(f)to travel for the purposes of work or to provide voluntary or charitable services, where it is not reasonably possible for that person to work, or to provide those services, from the place where they are living;