NHS London has overall responsibility for the performance of 31 primary care trusts (PCTs) - who operate in six clusters, 21 acute trusts, three mental health trusts and the London Ambulance Service. A further 15 trusts in London are foundation trusts and regulated by Monitor. At present, the NHS in London is planning how to meet the new direction for the NHS set out by the coalition government's White Paper, in which GPs take the lead role in commissioning care for patients from next year. Between them, London's 31 primary care trusts and NHS London, the strategic health authority for the capital, must reduce management costs by 54 percent by 2013. Further information can be found on www.london.nhs.uk. For all enquiries, please email communications@london.nhs.uk.