Eleven riders have been seeded into the Championship heats but with 27 nominations the other five riders will be determined by a 20 - heat qualifying meeting which will be held at 3pm .
The Championship heats will start at 7.30 pm .
Eleven riders have been seeded into the Championship heats , which will start at 7.30 pm , but with 27 nominations the other five riders will be determined by a 20 - heat qualifying meeting which will be held at 3pm .