So all avenues are now explored and dealt with.... the temp drainpipe is running beautifully...the surface water gully next to us is clear... and it's still bloody coming in.
Water Board have been out and put a camera down and put dye in, it coming in next to where their gully is, but couldn't see any immediate damage to their piping.
I am sort of at my wit's end now. A couple of the people we've spoken to (one builder, one chap from water board) have sort of gone "well it might be it is what it is when you have a lot of rain and you're just rort of stuck with it?" but it's starting to make me ill now. Insurers won't touch it, claiming it's "wear and tear" - not sure how that one works? - we've got bloody 25 litre spill socks down in there now and I'm getting up 5 and 6 times in the night to go and see if it's breached the defences.
We've got four days of extreme weather forecast this week. I'm terrified. I actually don't know who to ask to help.