It comes after government scientific advisers warned that "high numbers of beds may be needed for respiratory patients".

The extra beds will include more temporary units at hospital sites and 2,500 "virtual ward spaces" with patients monitored at home.

The NHS is already facing intense pressure.

According to official figures for July, nearly 30,000 patients waited more than 12 hours to be admitted to hospital.

July also saw the highest number of ambulance callouts for life-threatening conditions since records began, and only 40% of patients were able to leave hospital when ready to do so.

NHS chiefs say this could be the first winter where there is likely to be combined pressures from Covid and flu.

There are around 91,000 adult beds in general wards in England.

'Combined pressures'

In a letter to all NHS hospital trusts, NHS bosses say extra measures for this winter will include:

*  More call handlers working on NHS 111 and 999 calls to deal with higher demand

*  Mental health professionals deployed to 999 call centres for patients with mental health concerns

*  The NHS working more closely with social care so people can leave hospital safely and promptly

*  Health and wellbeing coaches available for patients at some GP practices

Professor Sir Stephen Powis, NHS national medical director said: "Winter is always a busy period for the NHS, and this is the first winter where we are likely to see combined pressures from Covid and flu, so it is right that we prepare as early as we can for the additional demand that we know we will face."

He added: "As ever, it is vital that the public continues to use NHS services in the usual way, including using 999 in an emergency and using NHS 111 online for other health issues.

"And when the time comes, book in for your Covid and flu vaccines if you are eligible."

Sir Andrew Goddard, president of the Royal College of Physicians, welcomed the additional measures but said extra staff were key.

He said: "Without any significant government intervention to retain and rapidly increase the workforce any plan will fall short. They all need people to deliver them, and it's people we're really lacking."

A Welsh government spokesperson said: "Planning for seasonal challenges is an all year round process, and we have already announced 100 new ambulance staff and plans to increase capacity for urgent and emergency care this winter. The Minister will make a statement on progress in the autumn."