ooo question - in the test are you allowed to go an unlimited top speed as long as it is deemed safe driving by the examiner at the time?
When we started about 3 years ago it was felt that the Island was about to introduce a national speed limit and so we agreed that 60 on main roads and 70 on the mountain road would be about right. Anyway this didn't happen and so there is a "bit more flexibility" now in speed issues.
However the test is carried out by a Police Class 1 driver and he would need to be sure you are in 100% control of your car at all times. So 140 down from the Creg might well be an issue for discussion