Recently-recovered British PM Boris Johnson clapped for hospital staff and care workers.
Johnson joined the UK clap to thank frontline coronavirus fighters.
The applause has become an emotional ritual to express gratitude to health workers.
The British PM appeared on the doorstep of his 10 Downing Street office in central London and clapped for 'fantastic NHS and carers'.
55-year-old Johnson has recently recovered from coronavirus and got back to work.
