The five person commission produced an Interim Report in December 2013 and delivered a Final Report in July 2015 .
The five person commission was chaired by the economist Sir Howard Davies and reported to the Department for Transport ( DfT ) .
The five person commission , which was chaired by the economist Sir Howard Davies and reported to the Department for Transport ( DfT ) , produced an Interim Report in December 2013 and delivered a Final Report in July 2015 .