Galliford Try said its infrastructure business had secured an extension to its contract with Yorkshire Water. The deal, won in partnership with AECOM Design Build, is worth at least £110m to the housebuilding and construction group.The contract runs between 2015 and 2020 and will involve £75m of work on sewerage and water treatment plants and another £35m of work on other installation projects.Chief Executive Greg Fitzgerald said: "We are delighted to further extend our long-standing relationship with Yorkshire Water as one of its joint venture partners, delivering improvements to water infrastructure for its customers."TB