Whilst I very rarely stick to the speed limit, I cannot argue with Squarebears answere here.
At the end of the day, when I've had points for speeding (only got three at the moment!) it's been my fault.
As squarebear has pointed out, if you got busted for speeding whilst overtaking, you were clearly exceeding the speed limit.
New Judge, can't agree more - prime example being the poor poster who forgot to let their insurer know that they changed thier number plate!
If the other vehicle is doing 20mph, then 30 should be ample to pass them, and there is no need to be doing more than this - if you are, then you have to assume that the extra speed is required because the overtaking is dangerous and you need to complete it quickly.
Compostella, whilst I can see where you're coming from (at least I think so), I don't agree with all the speed cameras dotted about, especially when they are clearly there for the money, but speed does kill when the driver is driving outside their level of experience.
Having deal with plenty of fatality claims, I can honestly say that they have all been due to excess speed in the wrong conditions, or due to the car being in the hands of an inexperienced driver.