Not updated for a fair bit... Lots of pictures commence. I'm still not in the position to continue onwards inside since the old electricty is still live, but the guy should have come today, so hopefully tomorrow he will be there.
So, two-three weeks work in a few pictures.
Found existing sewer pipe from grannies side, 40cm in soil, 110mm into 160mm then 90 deg turn.. all the joints resting in concrete for some reason..
At about 1.2M depth here.
So, excavated onwards to edge of polystyrene insulation.
Took me about 3 hours to do a 2M stretch, horrible horrible ground and the polystyrene insulation makes it impossible to get a pick axe or spade in there to make a hole, as the insulation against damp is 1M tall so needs to go 80CM into the ground, the trench is only 40cm.
Still a few things to do, like add valves for water at a later date, and install the lids on the chambers, they were supposed to be here on monday but havent' turned up yet..