Skanska UK’s chief executive has said the company has to “learn lessons” after being forced to write down £27m on three healthcare projects.

David Fison would not name the projects but Skanska revealed the three PPP schemes were worth almost £1.2bn. He insisted the £1bn Barts and Royal London scheme was not involved.

Fison said: “Nobody likes to say they’ve made a mistake but we’ve got to turn it to our advantage next time.”

In a statement Skanska said the scope of the schemes had changed, resulting in “substantial increases in the cost”.

Fison added: “We identified problems last year but underestimated their extent.”