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TERMINAL TERRACE: Retaining wall designer and contractor Phi Group recently completed 2,700m2 of retaining structures on the northern perimeter road improvements at Heathrow Airport. The Cheltenham-based company was responsible for the detailed design and construction of three terraces forming the retaining walls for a new 800 space car park close to the tunnel entrance to the central terminal area, opposite the famous Concorde model. The terraces were built using Phi Group's Keystone ...

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