David Cameron's extensions to GP hours have been praised by NHS England, but a British Medical Association committee chair has said the changes must be properly supported.
NHS England CEO Simon Stevens said the initiative could also free up time for GPs to spend with their sickest patients, giving it "the potential to be a win-win-win for patients, their doctors and the NHS".
But Dr Chaand Nagpaul, chair of the British Medical Association's General Practice Committee, said a more holistic approach was needed "so that community, social and urgent care work in tandem".
He also said ministers must "deliver on their commitment to increase resources in the community," so that GPs can be properly supported.
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