In November 2008 NHS Hull approved the purchase of the 72ft vessel to be used to train teenagers.
Mr Cameron said: ‘If this extravagance had been published for all to see, the people who made this decision would either have to justify it or scrap it.'
Christopher Long, chief executive of NHS Hull, said: ‘The project is an exciting opportunity for Hull to do something different; to build on its maritime history and really begin to make a difference to the health, skills and employability of our young people.
‘The board of NHS Hull has made a significant investment in the future of hundreds of local young people, with a view to benefiting them as individuals and society as a whole in the longer term.
‘It is important to remember that our decision to support this venture has not impacted upon any other health services available locally - patients can be assured that no services were cut or withdrawn in order to fund this project.'
- Do you support the PCT decision to spend £500,000 on a yacht?