With effect from 28 May 2020, individuals who have been notified that they have had contact with an infected person and instructed to stay at home for 14 days under the new NHS test and trace system will also be deemed incapable of work and eligible for SSP (statutory sick pay).
For further information, see the full guidance; https://www.gov.uk/guidance/nhs-test-and-trace-how-it-works