By Claire West

The Mayor of London Boris Johnson has joined forces with the NHS to make previously unreleased health data publicly available to Londoners for the first time.

NHS data about maternity, stroke and performance indicators are being published on the London Datastore website, which was launched earlier this year as part of the Mayor's campaign to increase transparency and accountability in the capital.

The NHS is making the information available in response to the Government's campaign to increase transparency in the service and further data on health services and conditions, including cardiovascular illness mental health and major trauma, will follow.

The Mayor of London Boris Johnson said: 'Healthcare is free at the point of delivery, so information about that care should be too. Improvements in the NHS can only be sustained if information about service and quality is unmediated for clinicians and public alike.

'By making this data available, our aim is to help support clinicians and hospitals in their efforts to improve healthcare provision across the capital. So release that information, let it be analysed, interpreted and assessed, to establish the most accurate diagnosis and ensure the best possible service for Londoners.'

Ruth Carnall, NHS London's Chief Executive commented: 'Freely available data will ensure that NHS services reflect what patients want and that we measure the right things to support improvements and not just what’s easy to measure. Increased transparency will help drive up standards and let GPs and clinicians share successes.'

Dr Andy Mitchell, Medical Director at NHS London, said: 'Releasing this NHS information will give people outside the NHS access to previously unreleased data. This will mean that any organisation or individual is able to offer service information to patients and the public. In the long term, this could allow patients to make choices about every part of their care including where they register with a GP, where they have tests and where they receive treatment.'