Barratt Developments PLC ( LON:BDEV ) has said it will use marshals to ensure self-distancing and safe working on its building sites as they start to re-open after coronavirus pandemic lockdown closures. The housebuilder intends to begin re-opening sites from May 11 through a phased return to full construction. David Thomas, Barratt's chief executive said the builder has established a new set of working protocols to meet current guidelines including changes to signage, site welfare facilities and compounds, site access and walkways.