More symptoms are being considered grounds for a Covid-19 test.

King's College London and the Zoe Symptom Study app have called on the Government to include three more symptoms in the list of those requiring a Covid test: fatigue, headache, a sore throat and diarrhoea.

The Zoe team, founded by Clive Dix who leads the Government's vaccine procurement programme, was the first to discover that loss of taste and smell was a symptom. Data collected with the app is used to track the epidemic and its varying effects.

Seven symptoms have been identified through analysis of 120,000 adults, the three classic cases and the four additional signs. In response, Government has said that the three classic symptoms are those most likely to include people with Covid-19.