A plan to build an airport in the Thames estuary has been rejected.
The proposal - dubbed "Boris Island" because of Boris Johnson's support - was on a shortlist of options for increasing airport capacity in UK.
The Airport Commission said the proposal's "substantial disadvantages" outweigh its potential benefits.
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Among the first to receive the tests will be critical care nurses, intensive care staff, ambulance workers and GPs.
The supercentenarian from Alton, Hampshire, who lived through the Spanish flu, is under Covid-19 lockdown.
Mr Johnson, who has a "temperature and persistent cough", says thanks to the "wizardry of modern technology" he can continue to work.