Tim Slade and the famed Hammerhead Nissan Silvia S13 extended their advantage at the top of the Royal Purple Pro Class, despite Barton Mawer finding more pace in the Porsche 968.

Slade pushed Hammerhead to the absolute limit on his morning flier, knocking the end-plate off the front wing on approach to Honeywell Garrett corner.

The lap still stopped the clock at 1:20.970s, a new Yokohama World Time Attack Challenge lap record.

Barton Mawer looked to respond, and improved on his best to a 1:21.485 in the second session, though shed part of the diffuser on the exit kerb at Honeywell Garrett in the process.

He’d immediately started a second flying lap, but was forced to pull off the circuit when the Porsche 968 broke a drive shaft as he exited Turn 8.

In the day’s opening session Mawer wasn’t able to set a lap when Under Suzuki had to stop as he rounded Amaando at the start of his lap.

The Nissan Silvia S15 driver did well to pick up the car as the rear stepped out at near top speed, stopping the car on the track to end the session and stop Mawer from responding to Slade’s effort.

Suzuki sits in a comfortable third place, a second off the back of Mawer and 1.5s away from Slade at the very top of the Yokohama World Time Attack Challenge timesheets.

Andy Forrest improved in the Team Scotland AFP Subaru WRX, nicknamed the Storm Trooper, with a 1:27.613s to sit fourth in class, as did Brad Shiels in the Holden Astra, banking a 1:28.413s to sit fifth.

With cool conditions expected to continue for the remainder of the daytimes could drop further still as teams head into the final two sessions of the event and the Spare’s Box Superlap Shootout.

Watch it all unfold at live.worldtimeattack.com