Ginetta Junior dominator Freddie Slater had led the way since early June but he has finally been demoted to second after calling time on his Ginetta campaign to instead enable him to race in Formula 4 machinery.
But, while he suffered the disappointment of losing top spot on Autosport's leaderboard, he did seal the Junior title last weekend as his nearest rivals failed to score sufficient points at Brands Hatch.
New table-topper McLeish achieved the second of his two Knockhill victories with a charging performance during the reversed-grid finale, a result that enables him to climb from third to first.
He is tied with Slater on 16 2023 victories but moves ahead courtesy of there being a higher average number of starters for his triumphs.
McLeish's main Scottish Legends rival, Stewart Black, scored three wins over the weekend - which featured action on both the clockwise and anti-clockwise Knockhill layouts - to take his own tally to 12 victories and he moves up 11 places into eighth.
While McLeish took advantage of Slater not racing in the UK, a number of other leading top 10 contenders failed to do so. Lucas Romanek, Aidan Hills, Steve Foden and Elliot Lettis all missed out on the chance to boost their positions after a rare weekend where they were not victorious.
One driver who did enjoy some success was Michael Cullen. Although he did not achieve any Fiesta firsts at Mondello Park, he did top both Irish Stryker races to move to 14 wins for the year and climb from seventh to fifth.
The other change inside the top 10 is two Ginetta GT victories for Luke Reade at Brands not only sealing him the championship but also taking him from 14th to ninth on the table.
Source: Autosport