Yesterday Mrs E Fitzpatrick Quinn bought 104,225 shares trading at 1.92p a share – 25% down on the pre-Brexit close price last Thursday.

The purchase comes after Leo Quinn spent £496,000 on more than doubling his shareholding in the contractor four months ago.

The latest moves will be seen as a big vote of confidence in Balfour Beatty’s Build to Last turn around programme, which Quinn instituted after joining the ailing business at the start of 2015.

As a consequence, the total number of shares held by Leo Quinn and persons connected with him has risen to 0.7% of Balfour’s share capital.