Remove all speed limits on motorways

The current 70mph limit on our motorways is woefully outdated,
in the real world how many drivers actually abide by it?

I suggest a removal of the motorway speed limit, to be replaced by more charges of careless or dangerous driving.
Consider this,

Person A is driving on a motorway at 6am on clear dry Sunday morning,very few vehicles on the road.
They are travelling at 100mph.

Person B is driving on the same motorway in winter at a busy period,
weaving in and out of traffic at 70mph.

Who is more dangerous?

We need less arbitary rules and a move towards common sense allowing police to exercise their judgement.
 

Why is this idea important?

The current 70mph limit on our motorways is woefully outdated,
in the real world how many drivers actually abide by it?

I suggest a removal of the motorway speed limit, to be replaced by more charges of careless or dangerous driving.
Consider this,

Person A is driving on a motorway at 6am on clear dry Sunday morning,very few vehicles on the road.
They are travelling at 100mph.

Person B is driving on the same motorway in winter at a busy period,
weaving in and out of traffic at 70mph.

Who is more dangerous?

We need less arbitary rules and a move towards common sense allowing police to exercise their judgement.