In his speech to the Labour conference in Brighton on Tuesday the prime minister referenced the success of the existing scheme in getting 75% of practices in England to open extended hours.
'In the next five years', he added, 'we will ensure every patient has the right to see a GP in the evening or at the weekend'.
Mr Brown also used the speech to unveil a pledge to bring Britain's ‘postcode lottery' social care system into the NHS, to create a new ‘National Care Service'.
‘For those with the highest needs we will now offer in their own homes free personal care,' he promised.
As expected, Mr Brown also unveiled a pledge of an ‘early diagnosis guarantee', which would allow patients to get access to tests within a week of seeing a GP.
Citing investment in improved treatment times and research, he added: ‘Our ambition is no less than to beat cancer in this generation.'
The promise received long applause from the audience.
Equally well received was a reference to last summer's 'we love the NHS' campaign on social networking site Twitter.