The Health Foundation warns that serious workforce shortfalls across English GP services pose a significant risk to the quality of health care over the next decade.
This was up from 683 in June 2021 – the most easily comparable figures from last year.
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Of them, 311 were partners, 204 were salaried GPs and 182 were in training.
There were also five regular locum GPs, and three GPs on retainer.
Across England, there were 35,626 FTE GPs at the end of May – up from 34,726 at the end of June.
However, new analysis by the Health Foundation’s REAL Centre, which does Research and Economic Analysis for the Long term, suggests there is currently a shortage of around 4,200 FTE GPs nationwide.
Researchers project this could rise to around 10,700 by 2030-31, and if an increasing number leave the profession due to burnout the estimated shortfall could double – meaning around half of posts would be vacant.
The Government has promised to recruit 6,000 extra GPs by 2024, but the Health Foundation says it is unlikely to do achieve this.
Anita Charlesworth, director of research at the Health Foundation and part of the REAL Centre, said: "It’s sobering that over the next decade things are set to get worse, not better.
"General practice is vital for a high quality and efficient health system, but the pressures it faces are longstanding, significant, and growing."
She added that the Government urgently needs to retain existing GPs and practice nurses, to ensure that sufficient numbers are trained for the future.
The NHS England figures show that the Derby and Derbyshire GP workforce is younger than elsewhere in the country.
Of the 704 FTE GPs in the area in May, 66 (9%) were under 30 years old – compared to 8% across England.
The Royal College of GPs said the worst-case scenarios of the Health Foundation findings would be a "disaster for patient care and the NHS as a whole".
Professor Martin Marshall, chairman of the RCGP, said: "GPs and our teams have been working under intense workload and workforce pressures for many years, but the pandemic has exacerbated these pressures.
"More consultations are being made every month in general practice than before the pandemic, and the care being delivered is increasingly complex.
"Yet, although recruitment efforts mean more GPs are in training than ever before, numbers of fully trained, full-time equivalent GPs are falling."
The Department of Health and Social Care said a record-breaking number of GPs started training last year.
A DHSC spokesman said: “We are hugely grateful to GPs and their staff for the care they provide to patients and we are working hard to support and grow the workforce in order to bust the Covid backlogs.
“We have invested £520 million to expand GP capacity during the pandemic, on top of £1.5 billion until 2024 and we are making 4,000 training places available for GPs each year to help create an extra 50 million appointments a year.”