A whistleblower has been paid a six-figure sum by one of the UK’s largest construction companies.

Nigel McArthur claims he was hounded out of his job as a pre-construction manager with Balfour Beatty, after he made a protected disclosure about a multi-million pound office development in Wales.

Mr McArthur was concerned about the firm’s sub-contract costs and profit margins and had raised the issue with his line manager.

He was told that he “should not have investigated the costs or alternatively that he should not be concerned about.”

The 56-year-old, who had worked at the firm for a decade, claimed he was later bullied and eventually quit the company in February last year.

He subsequently started a claim for constructive dismissal against Balfour Beatty.

A fortnight before the Employment Tribunal was due to hear the case, his old employer accepted liability, with the caveat that it had not carried out criminal activity or breached any legal obligations.

In a statement, the firm expressed regret that it had failed to support Mr McArthur following the concerns he had raised.

They will now pay the claimant – who has not worked since handing in his notice almost 12 months ago – a total of £137,000.