It was a dramatic start to the race as the #18 WPI Motorsport was tagged from behind by the #3 Assetto Motorsport forcing both off into the grass.
The safety car made a very early appearance as the Freddie Tomlinson and Moh Ritson collided at the Shell Oils hairpin.
Rain threatened to fall on Oulton Park and with just under half the race gone, the heavens opened and Jamie Caroline found himself going straight into the tyre barrier on the approach to Druids.
After a lengthy delay, the race got back under with it now being a 25-minute sprint race. Ian Loggie led the race from the restart in his #6 RAM Racing Mercedes, with the #42 Steller Motorsport of Richard Williams leading the GT4 class.
With success penalties being applied at the end of the race, along with the grid being very close together after the restart, it created a fascinating end to the race.
Taking the race victory was the #11 Paddock Motorsport of Kelvin Fletcher and Martin Plowman, who closed the gap between them and the #6 RAM Racing to less than seven seconds which give them the victory after the success penalty was applied to the Mercedes.
Joining them on the podium is the #8 Team Abba Racing Mercedes of Richard and Sam Neary, along with the #93 Sky Tempesta Racing Mercedes of Kevin Tse and Chris Froggatt.
The GT4 class was won by the #90 Century Motorsport of Jack Brown and Will Burns. They were joined on the podium by the #42 Steller Motorsport Audi of Richard Williams and Seannan Fielding and the #77 Enduro Motorsport of Morgan TIllbrook and Marcus Clutton.
The British GT Championship continues at Silverstone on May 7-8.