Apocryphally, in the 80s, hedgerows on the A5 on Anglesey were dotted with 205 size holes where young Tyros discovered and exceeded their own limits....
Ah, the A5. In the mid-Seventies I bought a house in Llangefni and being on Gnat Rects this involved regular night shifts. Trundling home in my 1600E Cortina in the early hours, things were sometimes livened up if the inst guy with a Lotus-Cortina and the sooty with a V12 E-Type (and rich parents) also finished at the same time. Even if I made it to the Mona straight ahead of them, I certainly was not by the end of the straight. I should add that to get home going down the Mona straight was not actually necessary, but was a lot more fun...