Scottish MSP Fergus Ewing has asked police to investigate why highest bidder was selected at Scottish Parliament.

The police are to investigate whether competition laws were broken when Bovis was selected to build the Scottish Parliament.

Scottish MSP Fergus Ewing wrote to the chief constable of Lothian and Borders after Lord Fraser criticised the project sponsor Barbara Doig for not explaining why Bovis had won the contract despite having the highest bid.

In the report Fraser says: “Barbara Doig was unable to provide me with any satisfactory reason for her selection of Bovis... her decision was flawed.”

Civil servants rejected a bid by Sir Robert Alpine that was £1.4m lower than Bovis’s and they failed to carry out the legal requirement of debriefing the contractor to explain why it had been unsuccessful, according to he report.

In The Sunday Times Ewing said that a criminal offence of “misfeasance in public office” may have been committed.

Sir David Steel, the parliament's presiding officer, has also warned that costs could rise over £431m due to arguments over legal fees and legal actions.