At 20:00 BST on Thursday, households across the UK stood on their doorsteps and balconies and applauded the efforts of the NHS and care workers in treating those affected by Covid-19.
Image copyright Getty ImagesThe initiative was devised by Annemarie Plas, from Brixton, south-west London, who was inspired by same event happening in her home country of the Netherlands, and in many other countries.
Annemarie posted details of the event on her social media channels, and enthusiasm for taking part quickly spread across the UK.
"I hope that it creates a positive boost for those on the frontline," she said.
"But also [when] you hear your neighbours applauding you know that we are together in this, because we are currently all in our houses."
There was applause in Manchester, below.
Image copyright Getty Images Image copyright Getty Images Image copyright Getty ImagesPeople cheered in Blackpool (above) and London (below).
Image copyright Getty ImagesThere was support from Northampton.
Image copyright Getty Images Image copyright Getty Images Image copyright Getty Images Image copyright PA MediaResidents in Glasgow (above) and Hove (below) showed their support.
Image copyright Getty ImagesThe NHS staff at Royal Liverpool University Hospital heard the public's appreciation and also joined in the applause.
Image copyright PA MediaBuildings around the UK were also lit in blue - the colour of the NHS logo - to pay tribute to the work of NHS staff, including Wembley Park Underground station, below.
Image copyright PA MediaThe Kelpies in Falkirk, a metal sculpture of horse heads, was lit up in blue.
Image copyright PA MediaBelfast City Hall turned blue.
Image copyright PA MediaLondon's Piccadilly Circus saluted NHS heroes on its iconic massive LED screen.
Image copyright Getty ImagesLincoln Cathedral lit up in blue.
Image copyright PA MediaBlackpool Tower featured a blue heart.
Image copyright PA MediaThe arch at Wembley Stadium in London was an arc of blue - and the stadium has promised to repeat the tribute every evening during the crisis.
Image copyright PA MediaAll photographs subject to copyright.