Plumber Dan Soap Box derby wows crowd on return to Whanganui streets 25 Jan, 2021 04:00 PM 3 minutes to read Thousands of keen locals gathered on the banks and streets around Pukenamu Queen's Park for the return of the Soap Box Derby. The street race returned to the centre of Whanganui for the first time since 2018, with Dan Goldsworthy (Plumber Dan) taking over the reins for this year's event. About 80 entered the derby which was part of Bayleys Whanganui Vintage Weekend. Starting at the top of Pukenamu, a wide variety of homemade carts and drift trikes raced down the winding road before getting onto Drews Ave and finishing on Rutland St.