Kier also knocked Balfour Beatty off the top position on the 12-month rolling league table, bagging £1.87bn of work to Balfour’s £1.74bn total.
Among the other big wins in May, Lend Lease booked the £151m job to build a super prison in Wrexham for Ministry of Justice.
Sir Robert McAlpine also has a £50m job to redevelop Newcastle University.
Bouygues-owned Leadbitter also bagged a £100m regeneration job in Bedford while Volker Fitzpatrick was confirmed for the £82m job to build a maintenance depot and offices in Doncaster for joint clients, Agility Rail and Hitachi Rail Europe.