Ilott controlled the race from the front and was never troubled as his lead got ever wider.
Three Britons are in the top four in qualifying for the second race at Silverstone, as Aitken scores his best result of the season in third ahead of Ticktum.
Mick Schumacher, who already showed his one lap pace at Silverstone last weekend, preceded twopodium finishers, Deletraz and Ticktum.
Free Practice – Friday 7th Ausut, 12:55 GMT +1
Qualifying – Friday 7th August, 17:00 GMT +1
Feature Race – Saturday 8th August, 15:45 GMT +1
29 laps or 60 min
Sprint Race – Sunday 9th August, 10:10 GMT +1
21 laps or 45 min
Circuit length: 5.891 km – 3.661 mi
Both drivers took their second win of 2020, but while Lawson was the top scorer of the weekend, Beckmann lost points compared to his nearest rivals in the championship.