Speed limits need to be respected and you should always drive to the conditions.
The 70mph speed limit was set in the UK in 1965 and that still the limit.
My point is that a lot of UK drivers do not compare to the better standards on the EU.
Our motorways, slip roads in the UK are as good as those on the EU, (our slip roads tend to have a lot of run off) the problem is we are an island all fighting for the same piece of tarmac.
If you want to drive fast, do track days or go to the North Loop.