Newcomers hit tarmac on Saturday
The first Festival of Motorcycling 2017 practice session is scheduled for tomorrow evening.
Classic and MGP Newcomers will be first away from 5.20pm - with roads re-opening no later than 9pm.
The sessions are untimed.
Organisers say there is still a shortage of marshalls, and have renewed a call for volunteers - even those who haven't done it before.
Overseeing the fortnight's racing action will be Clerk of the Course, Gary Thompson: