Jacqueline Bowker, student engineer and Anita Manning, chain girl, with the 'Jay Robertson', a large jack-up barge working in the River Severn, pictured in the background during the intial phases of construction of the Second Severn Crossing in 1992. The 'Jay Robertson' was used to drill piles through the sea bed for two viaduct support piers close to the Severn Rail Tunnel