The message
from Dave Fawthrop contains these words:

I looked at the plans and they are not accurate enough to be useful.

I can almost hear the lawyers rubbing they hands togther with glee.
Boundary disputes can be a big money winner for them not least because
there are not sufficently accurate measurements to be had and once the
original boundary markers go not a hope in hell of fixing boundaries to
the nearest inch, or even in most cases the nearest foot.

Leaving aside the inherent lack of precision in subdividing a field into
building plots it is impossible to scale off even as large a scale as
1:1250 to the required accuracy when the thickness of a line may amount
to a couple of feet.

--
Roger Chapman