First problem was that the LHS dis board appeared to be wired on a live-neutral reverse. Removing the top of the henley block and dis board confirmed that red went to the neutral bar, and black to the busbar. Feeling that this qualified as in need of an urgent fix I removed the company fuse and corrected the wiring to the incomer. The rest of this side seem OK-ish although I need a couple of 30amp Junction boxes to replace the insulation taped connector block on one socket ring.
On to the LHS.
All the circuits are wired on individual switch fuses most of which seemed OK although identifying which sockets were on which circuit was challenging (front and back wall of the kitchen on different circuits!). There is a minor issue of a hall light which has been tailed into the door bell using connector block so this will be tidied up.
The final problem is that there is one circuit which is ancient and has no earth, fuses in the live and neutral. This feeds the downstairs lights + a couple of upstairs lights + 1 downstairs socket and 1 upstairs sockets. I don't want to replace it ahead of re-wiring in general so want to make it as safe as possible pending that. For the lights, most of the switches are bakelite rocker switches which have no earth connection so are no more dangerous now than they have ever been. Where I am wondering what to do is over newer switches where the 2 core has been replaced with T&E so there is a floating earth which picks up a high induced voltage but worse has no path to ground in the case of a live-earth fault at the switch. Is the best thing to replace the switches with pull-cord ones for the moment and if I don't should I disconnect the floating earth? For the sockets I would take them out but they are the two hoover points. The hoover is double insulated so less worrying but if they are there the tendency to plug other stuff in is almost inevitable. As an interim measure is it a good idea to connect the earth points in the sockets to earth in another circuit using a separate earth wire or is this somehow worse.
Please no posts saying pull it out and start again, because I am, but not tomorrow. Any advice on how to improve the situation in the short term very gratefully received.