....Definitely "Ouch!" on the first two, being points. But "Phew!!" on the second two, being let-offs with warnings.
I actually stick rigidly to the 20, 30, 40 limits and have been trained to arrive at the actual sign at the legal speed and not to exceed it until my shoulders are level with the GLF sign.
GLF? - Go Like f**k!! The NSL 70's are the ones I have trouble with when the road/traffic conditions are clear. Just like a good horse, a good car needs to be given free rein occasionally.