[1/6] NHS nurses take part in a strike, during a dispute with the government over pay, outside St Thomas' Hospital in London, Britain December 15, 2022.
An estimated 100,000 nurses will strike at 76 hospitals and health centres, cancelling an estimated 70,000 appointments, procedures and surgeries in Britain's state-funded NHS.
"What a tragic day.
This is a tragic day for nursing, it is a tragic day for patients, patients in hospitals like this, and it is a tragic day for people of this society and for our NHS," Pat Cullen, the head of the Royal College of Nursing (RCN) union, said to the BBC on a picket line on Thursday.
Polling ahead of the nursing strike showed that a majority of Britons support the action, but once the walk-outs are underway politicians will be closely monitoring public opinion.