SUNDAY sees the climactic finale of the Top Ten Challenge at Gurston Down Speed Hillclimb, near Salisbury.

The Challenge series is currently headed by Frampton ’s Rod Thorne, who has scored in all three rounds in his 3.5 Pilbeam MP58 single seater and his 5.0 Pilbeam MP43 sports racer.

He goes in his single seater this weekend and however well he goes, his final position will depend on how well his opponents do.

In second place is pre-season favourite Tony Wiltshire from Newton Abbott, who scored the maximum 10 points in the first two rounds but crashed out in practice in his 2.5 Gould GR55 in round three.

But if Wiltshire can win this final round then he will be crowned 2012 Top Ten Challenge champion.

Also in the hunt is Terry Graves of Launceston in his 3.5 Gould GR37, who could top the table if he wins this event outright and Wiltshire finishes third or lower on the day.

And should James Blackmore from Ropley near Winchester win on the day in his 1.6 OMS 25, and Wiltshire and Graves are third or lower, then he could take the Challenge.

So it’s all to play for as the competition gets underway at 1pm following practice at 8.30am.

Elsewhere on the schedule, Simon Purcell from Sherborne has gone well in his supercharged 1.4 Lotus Exige this year and looks certain to win the championship class here.

But can he win the up to 2000cc modified limited production marque sports car class on the day again against former triple Gurston champion Steve Butts from Abingdon in his supercharged and turbocharged 1.4 Lotus Elise?

The up to 2000cc modified specialist production class looks like it will go to Ritchie Gatt from Faygate in his 2.0 Westfield but last time out he was beaten by the hard trying Geoff Blake from Weymouth in the similar car he shares with his father Graham.

In the over 2000cc sports libre class, Colin Pook of Dorchester shares the 5.0 Pilbeam MP43 with close neighbour Hayley Thorne, while Sue Hayes from Salisbury runs in her 2.6 Force SR8.