Entering service with GBRf in December 2006, on Friday 10 August 2007 66725 was named Sunderland by Niall Quinn, Sunderland Football Club's chairman. The naming ceremony celebrated the new contract between GBRf and Drax Power Ltd to haul coal trains from Tyne Dock to Drax Power Station and marked the 70th anniversary of Sunderland's victory over Preston North End in the 1937 FA Cup Final. When the base livery changed in September 2017, 66725's revised livery was adapted to include the Sunderland FC crests and nameplate.