Contractor Galliford Try has been confirmed as one of the contractors on Network Rail's £1bn five-year Enhancements Multi Asset Framework.The programme covers enhancement projects worth up to £15m and includes platform extensions, track, signalling, electrification, telecommunications and other projects to help expend the rail network's capacity.'This appointment follows our successful Buildings Framework Agreement with Network Rail and enables us to grow further our portfolio for projects for this key public sector infrastructure client,' said Galliford boss Greg Fitzgerald.The firm won two rail contracts worth £19m in April, one with Network Rail to regenerate Newport station in South Wales, and the other with London Underground to upgrade 12 former Silverlink stations on the London Overground line.