Jethro_uk wrote:

Except a small patch on one slab. Which rather worringly looks to be over
the line of the drain pipe from the external drain by the side of the
house, to where it joins the inspection pit with the manhole cover about
2.5m away.

There's not a dripping gutter above the damp patch is there?

--
Nige Danton - Replace the obvious with g.m.a.i.l