Engineering group Costain has been appointed to three transmission frameworks with National Grid to provide a broad range of services, including front end engineering design, programme management, and construction.The agreements, which begin immediately, include installing new overhead lines as part of a four-year deal, to carry out work on underground cables during a four-year period, and the upgrading of the UK's gas transmission system. Andrew Wyllie, the Chief Executive of Costain, said: "We are delighted to have been appointed to these frameworks by National Grid, for whom we are currently delivering the London Power Tunnels. "These awards are at the very heart of our 'Engineering Tomorrow' strategy of focusing on blue chip customers whose major spending plans are underpinned by strategic national needs. "The awards also reflect the ongoing broadening of our service, in which we form long-term, strategic partnerships with our customers to deliver an increasingly multidisciplinary range of services."National Grid has planned to invest as much as £26bn between now and 2011 on upgrading and developing their gas and electricity networks.Costain said that by securing a place on both electricity frameworks, it can deliver end-to-end network solutions which will "form an important part of upgrading the national infrastructure to support connection of low carbon generation and the UK's future energy needs".NR