Silverline Subaru BMR Racing's Jason Plato has kicked off his momentous weekend by setting the early pace at Knockhill during an incident packed first practice session.
Plato, who is due to celebrate his 500th start in the BTCC in tomorrow's opening race, narrowly ended the opening 40-minute running ahead of Speedworks Motorsport's Tom Ingram after setting a 52.545 second lap around the infamous Scottish circuit.
FP1 proved a hectic affair as a lengthy stoppage just over halfway through the session trimmed the on-track running. The halt in action was triggered when Andrew Jordan's Motorbase Performance Ford left the circuit at Clark corner.
In true Knockhill fashion, just 0.4s covered the top-ten order. MG's Ashley Sutton was third fastest behind Plato and Ingram while WIX Racing's Adam Morgan produced the fourth best effort.
Sam Tordoff, looking to bounce back from his race three retirement at Snetterton, ended the opening session as the quickest West Surrey Racing runner in fifth ahead of Motorbase's Jordan, who managed to hold onto sixth.
Home hero Aiden Moffat emerged as the fastest Scottish runner in seventh aboard his Mercedes A-Class while MG's Josh Cook was eight ahead of BMW's Jack Goff and reigning champion Gordon Shedden.
Elsewhere, Hunter Abbott and Dan Welch both managed to record valuable running during the first session following major rebuilds to their machinery after Snetterton.