One of the three hospitals managed by the local NHS trust - Southend Hospital - has today (Monday, 11 January) confirmed that it is starting to ration supplies to patients and is in a 'critical situation'.

An internal document has confirmed that patients receiving oxygen should have their supply 'weaned'.

The memo says: "We have reached a critical situation with oxygen supply. It is imperative we use oxygen safely and efficiently.

"All patients should have a target saturation of 88-92 per cent.

"Patients with a saturation above 92 per cent who are on oxygen should have their oxygen weaned within a target range."

The writer of the memo, Southend Hospital Managing Director Yvonne Blucher, adds: "I can assure all that maintaining saturations within this target range is safe an no patient will come to harm as a result.

"It is imperative that this is acted on immediately."

In the wake of the leaked memo Ms Butcher has also been quoted by the BBC as saying the Trust was "working to manage" the situation.

She added: "We are experiencing high demand for oxygen because of rising numbers of inpatients with Covid-19 and we are working to manage this."

"The public can play their part by staying home and, where they cannot, following the 'hands, face, space' advice to cut the spread of the virus."