Found it, was in the SAU Nats entry regs -
TYRES - Ensure you understand what tyres will put you into what class!!!!
List of soft compound street tyres – UTQG AS & RS Classes
Federal 595RS - 180AA
Federal 595RS-R - 140AA
Falken Azenis RT615 - 200AA
Yokohama Advan AD08 - 180AA
Toyo Trampio R1-R - 100AA
Nitto NT-555R Drag - 100AA
Nitto NT-05 - 200AA
Kumho KU36 - 180AA
Hankook RS-3 - 140AA
List of known R Spec Tyres – UTQG AM & RM Classes
Bridgestone Potenza RE11S - 40
Bridgestone Potenza RE55 - 40
Bridgestone Potenza RE520S
Toyo Proxes RA1 - 40AA
Toyo Proxes R888 - 50AA
Yokohamma Advan A050 - 40AA
Yokohamma Advan A048 - 60AA
Michelin Pilot Cup - 80AA
Avon Tech R-A
Hoosier A3S03/R3S04 - 40AC
Yokohamma Advan A032R - 60AA
Kumho VictoRacer V700 - 50AA
Dunlop D98J Kumho Ecsta V700 - 50AA
Dunlop D01J Pirelli P Zero C
Dunlop D02J Pirelli P Zero Corsa
Dunlop D03Z
Dunlop D93J
BFG G Force T/A R1 - 0AA
Hankook Z211
Hankook Z209
Hankook Z221 50-80AA