Reference C1 Racing Series, Series Regulation 5.14.4:

For this event, authorisation has been received from Motorsport UK for the use of M8 bolts in respect of the fixation of ballast, in accordance with Version 7 of the 2025 National Competition Rules, specifically NCR Ch.7 App.2 Art.19.1.

Ian Hattersley
Motorsport UK Steward