Christian McArdle wrote:

Note that there are loads of things you may be prosecuted for whilst driving
that don't have a specific piece of legislation. They are just prosecuted
under a general careless or dangerous driving charge.

Well yes, but that's hardly relevant is it. There *is* a speed limit
and you can be prosecuted simply for exceeding it. You can also be
prosecuted for careless/dangerous driving if you go round a corner too
fast but lower than the speed limit. However you wouldn't thus say
"there is a legal speed limit on this corner (that is lower than the
general speed limit)".

--
Chris Green