APT-backed Knapp, an ex-para from Farningham, will contest the races with 2014 Vice Champion Josh Cook’s Team Cooksport squad – boosting the outfit’s entry for the event to three cars (alongside Rory Collingbourne and Charles Ladell).
The 42-year-old, who raced for JamSport in 2014, said: “I’ve seen all the media build-up, it’s a great championship and the opportunity to return was too great to resist.
“I did the second half of last year but haven’t driven a Clio Cup car since October. More recently I’ve been competing in an 800bhp Time Attack Mitsubishi so it might take me all of Friday testing to re-acclimatise again!
“I’ve not got any great expectations but it would be nice to challenge for a top ten in one of the two races.”