News Balfour Beatty’s Thames Tideway Joint Venture Breaks Through as TBM Rachel Completes 7km Journey from Fulham to Acton 30th September 2020 Balfour Beatty’s Thames Tideway joint venture with BAM Nuttall and Morgan Sindall, today announces that a giant tunnel boring machine (TBM) building part of London’s new super sewer has completed its journey, marking another crucial