Mansfield although already working with Draft house on other projects were asked by Charlie Mcveigh Managing Director of Draft House to help create the bump caves in Tower Bridge. Mansfield worked alongside LBF Architects and Studio Firth designers to help craft their new basement bar, the bump caves. The design was based on a 1920’s speakeasy from the prohibition era in America with the bar actually distilling their own gin. The design featured heavily on reclaimed materials including the use of brick slips.