Schedules for the TV coverage of the opening races in the 2008 Heritage GT Car Challenge have been announced.Highlights of the pair of races at Donington Park in April will first be screened on Sky Sports Extra during the early evening of Tuesday 27 May, with a further five repeat broadcasts.The provisional broadcast schedule is as follows:Tuesday 27/05/08 at 18.30 on Sky Sports ExtraTuesday 27/05/08 at 23.30 on Sky Sports ExtraWednesday 28/05/08 at 01.30 on Sky Sports ExtraSaturday 31/05/08 at 03.30 on Sky Sports 2Saturday 31/05/08 at 05.30 on Sky Sports 2Sunday 01/06/08 at 04.30 on Sky Sports 2