Bob Miller, head of UK construction at Hollandia and the man responsible for the state-of-the-art stadium roof, departs from the scheme.

The man responsible for the completion of Wembley Stadium’s state-of-the art roof has left the project, it has emerged.

Bob Miller, head of UK construction at Dutch firm Hollandia, has departed the £757 million rebuilding of the national stadium.

Miller was Hollandia's director in charge of Wembley, overseeing three of the firm's senior on-site project managers who are tasked with ensuring that the retractable roof is finally coupled to the 436-foot supporting arch next month.

His departure comes barely eight weeks after Multiplex was forced to put back completion of the stadium by three months to the end of March 2006.

Miller's exit would not be the first sparked by the project. Multiplex's founding chairman John Roberts and the firm's UK managing director Noel Henderson quit amid cost overruns and delays earlier this year.

Miller's role is understood to have already been taken by a Dutch colleague.

Multiplex and Hollandia both said Miller's departure would not change the timetable for finishing the roof or the overall project.