Normally an application to renew a lorry licence at age 45 or over must include a medical examination report (D4) which is signed by a doctor. However, NHS doctors cannot carry out these examinations so lorry drivers are currently unable to obtain D4 medical reports required to support their application.
So, in these special circumstances, a D4 will not be required when applying to renew a lorry or bus licence until further notice. However, this will only apply if the licence has expired or is due to expire on or after 1 January 2020. A licence will be issued for a one year period – a new application with D4 will then be required.
See here for more info - Department for Transport – driving licences
Temporary relaxation of the enforcement of the drivers’ hours rules - Department for Transport – Drivers’ Hours
For details of service station opening - Highways England – service station opening