The 1.55 mile National Circuit incorporates the only remaining section of the original Anglesey Circuit.

School Corner is rated by many drivers and motoring journalists as one of the most demanding high speed corners currently in use in Britain and Ireland. For this reason, this section has been incorporated into an ideal layout for national events, maintaining all the characteristics of the original circuit which were so popular, together with a longer lap distance, improved surface, width and run-off areas.