Jethro set a 1:34.96 at Anglesey International.  Look at the other times:

Rank Vehicle Driver Time  PS / KG

1. BAC MONO Oliver Webb 1:31.00 284 / 540
2. McLaren P1 Alexander West 1:34.25 916 / 1490
3. McLaren 675LT Spider unknown 1:35.70 675 / 1368
4. Porsche 911 GT3 RS 4.0 (997) Chris Harris 1:36.10 500 / 1360
5. Ferrari 488 GTB unknown 1:36.90 670 / 1535
6. TVR T350t Red Rose LW Cliff Jobson 1:37.00 380 / 1000
7. McLaren 570S unknown 1:37.90 570 / 1462
8. Porsche 911 GT3 (991) Chris Harris 1:38.10 476 / 1439
9. Porsche 911 R (991) unknown 1:38.70 500 / 1373
10. BMW M3 GTS Chris Harris 1:39.00 450 / 1543
11. C 63 AMG Coupe Black Series Chris Harris 1:39.10 517 / 1748
12. BMW M4 GTS unknown 1:40.40 500 / 1599
13. Aston Martin V12 Vantage S Chris Harris 1:40.80 573 / 1665
14. Jaguar F-Type SVR unknown 1:41.20 575 / 1797
15. Honda NSX (Mk II) unknown 1:41.70

581 / 1765

http://fastestlaps.com/tracks/anglesey-international-gp
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73 Carrera RS 2.7 Carbon Fiber replica (1,890 lbs), 06 EVO9 with track mods. Former: 16 Cayman GT4, 73 911S, Two 951S's, 996 C2, 993 C2, 98 Ferrari 550, 79 635CSi