Zoomup:

This situation is obviously a very serious one making a shock and/or fire risk very possible. As you know it needs serious urgent attention. I would try to escalate the claim for renewals to be undertaken without delay.  Perhaps a report of a burning sell and concerns about fire would help? If you undertake the work, a switch fuse will be needed at the meter position and a new sub-main installed to the upper level. I would also assume TN-C-S despite what you can see.


Edit add. I would be tempted to get repairs undertaken immediately whatever the cost to the client. It is vital to ensure safety. Safety first, cost second. 


Can you run a new sub-main externally?


Z.

Agreed that it does need urgent attention Zoomup‍ and I don't mind admitting that whilst I am qualified, I wouldn't feel competent to do this on my own hence asking for advice here from more experienced people like yourself.  And getting someone else in to do it, help and learn from it.

I'm almost of a mind to get the client to bite the bullet and get a new separate supply and remove the problem from access, sharing a cutout with the downstairs flat and the loop in, etc.  Or do you think that's excess and unneccesary cost.  Install a new cabinet outside, move the smart meter outside as well; install a Lewden switched fuse in there and run a 25mm2 three core SWA externally and enter the upstairs flat at a similar point to where the old VIR cables exit the brickwork and enter the CU direct?

Zoomup:

This situation is obviously a very serious one making a shock and/or fire risk very possible. As you know it needs serious urgent attention. I would try to escalate the claim for renewals to be undertaken without delay.  Perhaps a report of a burning sell and concerns about fire would help? If you undertake the work, a switch fuse will be needed at the meter position and a new sub-main installed to the upper level. I would also assume TN-C-S despite what you can see.


Edit add. I would be tempted to get repairs undertaken immediately whatever the cost to the client. It is vital to ensure safety. Safety first, cost second. 


Can you run a new sub-main externally?


Z.

Agreed that it does need urgent attention Zoomup‍ and I don't mind admitting that whilst I am qualified, I wouldn't feel competent to do this on my own hence asking for advice here from more experienced people like yourself.  And getting someone else in to do it, help and learn from it.

I'm almost of a mind to get the client to bite the bullet and get a new separate supply and remove the problem from access, sharing a cutout with the downstairs flat and the loop in, etc.  Or do you think that's excess and unneccesary cost.  Install a new cabinet outside, move the smart meter outside as well; install a Lewden switched fuse in there and run a 25mm2 three core SWA externally and enter the upstairs flat at a similar point to where the old VIR cables exit the brickwork and enter the CU direct?