Final push to install 8,500-tonne M27 underpass in Hampshire BBCMajor motorway closure over Christmas period as part of £100m project Island FMM27 closure: Innovative technique to move 8,500 tonne Box Slide into place is explained portsmouth.co.uk‘Not ideal’ — what will ten-day M27 closure mean for drivers and how will it work? Daily EchoMotorway to be closed for 10 days for giant underpass to be slid into place | ITV News ITVX