Support services firm Carillion has announced the win of two contracts worth up to £450m.The firm has signed a five-year framework contract to provide gas and multi-utility services for Fulcrum, potentially worth £70 million. It has also been selected as the preferred bidder by National Grid to provide refurbishment and upgrade services for its overhead transmission network in England and Wales, potentially worth up to £375 m over five years. Under the framework contract with Fulcrum, which will begin immediately, Carillion will deliver gas and multi-utility connections across the North of England, North & Central Wales, West Midlands, East Midlands and East Anglia. Its contract with the National Grid will be carried out as a joint venture with with Eltel Networks and forms part of a £22bn investment programme by National Grid.The main contract will start in April 2012, with the volume of work allocated to the joint venture increasing annually, subject to performance.Carillion's chief executive, John McDonough, said: "The contract for Fulcrum enhances Carillion's position as one of the largest providers of gas connection services in the UK and our selection as the preferred bidder to deliver overhead line services for the National Grid underlines the strength of Carillion's offering as a leader in this market sector".