Balfour Beatty has launched an investigation into allegations pursued by US Democratic presidential candidate Senator Elizabeth Warren that its US military housing business historically falsified records. The housing arm has appointed law firm Hunton Andrews Kurth to investigate the allegations about the Tinker Air Force Base in Oklahoma, which it has managed since 2008 when it won a 50-year, $410m private finance initiative contract to manage almost 2,500 family homes for three US air force bases. Ms Warren is demanding answers from the air force and Balfour, as well as four other developers in the sector, following accusations that the companies have provided substandard housing. She is also attempting to push a bill through Congress that would improve complaints processes for residents. The demands for the inquiry followed testimonies from military families at a Senate armed services hearing in February, in which they described black mould, leaky roofs, rats, faulty wiring and other substandard living conditions in their privatised housing. An investigation by Reuters subsequently alleged that Balfour falsified maintenance records to help it secure incentive fees at the Tink...