The chief executive of one of the trusts proposing the troubled £800m PFI health campus in Paddington, west London, quit his post this week.
Gareth Goodier, the head of the Royal Brompton & Harefield NHS Trust, announced on Monday that he was joining the North West London Strategic Health Authority. Goodier only took up his position in March.
His departure came days after the strategic health authority, which he will join in the autumn, was instructed in a government review to draw up another outline business case for the Paddington scheme.
The review has still to be published.
The campus is intended to provide facilities for the Brompton & Harefield and St Mary's NHS trusts and Imperial College, London.
Building revealed last week that the outline business case could include a land swap deal with neighbouring landowner Chelsfield. This deal would involve the campus being built on land originally planned for an office building designed by the Richard Rogers Partnership.