The annual trip north of the border to Knockhill (23/24 August) comes at a time when the three title contests in the Porsche Carrera Cup GB are very finely balanced. At the head of the championship, just 16 points separate Josh Webster and Michael Meadows.Rounds 12 and 13 of the 19-race season will pit the drivers against the spectacular moorland track and while Webster and Meadows will now battle out the destiny of the overall title, it is also all to play for in the Pro-Am1 and Pro-Am2 categories. Justin Sherwood and Rob Smith (Pro-Am1) and Steven Liquorish and Peter Kyle-Henney (Pro-Am2) are the key contenders.The latest Type-991 911 GT3 Cup will make a fabulous sight on its debut in Scotland and it is Carrera Cup Scholarship driver Webster (Redline Racing) who heads the overall points after 11 of the season’s 19 races. Never before has a Scholarship driver topped the points in his Scholarship year and Stowmarket-based 20-year-old has now taken four wins on the trot at Croft and Snetterton. However, Josh has never raced at Knockhill before and that is just the sort of opportunity that Meadows (Samsung UHD TV Racing) is looking for to exploit as he bids to bounce back in his quest for a third straight title. The 16-point gap is modest with eight races still to run and, more than anything, the drivers need to finish every race strongly.Ranged against Webster and Meadows in the overall stakes will be three more Pro category drivers and each of them could be a contender for race wins. Paul Rees (In2 Racing) currently has third in the standings from Victor Jimenez (Redline Racing) while series newcomer Pepe Massot (Parr Motorsport) is fast-emerging as a major force despite his limited experience of these cars.In the Pro-Am1 category, current points’ leader Karl Leonard (Team Parker Racing) is likely to miss the Knockhill weekend and will almost certainly lose his category lead as a result. The man set to move ahead is the very experienced Justin Sherwood (Team Parker Racing) but Rob Smith (Redline Racing) could yet work into contention with a late season rush on the back of an impressive double win last time out at Snetterton.Added to the Pro-Am1 mix at Snetterton was former GT Cup race winner Jordan Witt in another car from the Redline Racing stable.In the Pro-Am2 category, Steven Liquorish (Team Parker Racing) and Peter Kyle-Henney (Parr Motorsport) are proving to be incredibly closely matched and neither of them has raced a Porsche at Knockhill before. Although they are level on points in the overall standings, Liquorish has a small lead in the Pro-Am2 scores thanks to picking up more of the extra points for setting pole position and fastest lap in the category.After qualifying at 13.50 on Saturday (23 August), round 12 of the Carrera Cup GB will start at 09.40 on Sunday (24 August) with round 13 at 15.40. Round 13 will be broadcast live on ITV4. Live circuit commentary throughout the weekend is available at www.btcc.net and live timing can be found at www.tsl-timing.com