No team orders for Arena

Onslow-Cole is one of four drivers in with a chance of becoming champion at Brands as he trails series leader Jason Plato by 24 points with 52 still up for grabs.

And, with Arena still in contention for the manufacturers'/constructors', teams', drivers', independent teams' and independent drivers' championship, Earle said that he won't do anything to jeopardise his driver's chances.

"We can't afford to be greedy," Earle, who instructed Onslow-Cole to hand Chilton a victory at Silverstone recently, told AUTOSPORT.

"Yes we can win all five championships, but we might not win any, so we'll not prioritise one over the other and that means allowing both our drivers to go and race without any team orders."

Onslow-Cole, who has lay inside the top four of the championship since Oulton Park in May, said he was surprised to still be in contention.

"If you'd told me at the start of the year that we'd go to the last round in with a chance of winning all of the five titles on offer, I wouldn't have believed you," he said.

"We started from scratch with the LPG engine during the winter, and the chassis wasn't a world-beater either.

"But as the year's gone on the team's done a fantastic job on making the car brake and handle a lot better. It's a real credit to them how positive things are looking now."

Arena has twice been hit with penalties by series organiser TOCA this year, designed to reduce the straightline speed advantage afforded by the Ford Focus ST's turbocharged LPG engine.

Onslow-Cole said that overcoming those penalties to win the title would put the icing on the cake of a fine season in which he has already won four times.

"They [TOCA] have even been putting all kinds of things on the car to slow us down this year, which is kind of a back-handed compliment.

"That's one of the reasons I was so happy to win at Donington last time and I'm optimistic that the title won't be won before the last race. I just have to try and make sure I'm still in contention by then."

Onslow-Cole also leads the Independent Championship by 18 points from Motorbase BMW driver Steven Kane. Chilton can also take that title, and trails Onslow-Cole by 22 points.