In 2003, Jonathan finished 3rd overall in the Scottish Formula Ford Zetec Championship, however he was 2nd and 5pts behind Ryan Cannon in the Newcomer's Cup.

2005 saw him resume his battle with Pead in the Clios, which took the championship down to the final meeting of the year at Donington Park, where Adam clinched it with a race to spare.

At Knockhill he took a double hat-trick – 2 poles, 2 victories, 2 fastest laps, although he remained 14 points behind championship leader Robert Lawson.

[6] At the first round of the season at Brands Hatch he was first past the chequered flag in the third race of the day, only to be penalised for hitting Jason Plato when he passed the 2001 champion for the lead.

Unable to find funding to continue in the BTCC, Adam moved to the British GT Championship to drive an Aston Martin DBRS9 for Beechdean Motorsport for 2011.

63 Corvette of Jordan Taylor, Antonio García, and Jan Magnussen in the final two laps of the race to take the win.