Clarke was the driver to beat for much of the Clubmans Sports Prototype campaign but a tricky final round at Brands Hatch in September hampered his bid to head Autosport's winners' table.
However, he was back in action at the Walter Hayes Trophy event at Silverstone last weekend, dominating the Pumpkin Smash Race in his regular Clubmans Phantom PR22 to register his 16th success of the year.
He then drew level with table-topper Michael Cullen after being the first of the Janet Cesar class cars (Formula Fords built between 1982 and 1998) in the final of the WHT itself in a Van Diemen RF90.
While there were only three starters from that division, the unique nature of the knockout event and the fact Clarke had defeated strong class opposition to make it into the final against more modern machinery means it also counts towards his tally.
But, his two class successes compared to Cullen's one means Clarke rises from seventh to second in the rankings and the Irishman just maintains his lead.
Also achieving Janet Cesar glory in his RF91 was Callum Grant. He won an entertaining historic pre-final on Saturday and headed the class in the second WHT heat to climb two spots into eighth place.
Source: Autosport