Kevin wrote:
My latest idea is to put something like a drive drain running parallel
to the rear of the house and about two or three feet from the house.

What is a "drive drain"? One of the Accodrain type things?

I
should then be able to run this into one of the rainwater gulleys. The
only part I haven't yet worked out is how to get the water from the
land drains into the drive drain, or even if I can make some kind of
arrangement using just land drains which would remove the need for the
expensive drive drain altogether.

You could have a gravel square with a trapped gulley/grille to
underground drain.


I'm also thinking that I could hide the outflow from the land drains
underneath some decking which I'm thinking of putting along the back of
the house, but again I would be hoping to eventually route the water
into one of the rainwater gulleys rather than just let it soak away.