Hi Everyone,
Thank you all so so much for your thoughts and advice! I met with a really helpful NAPIT registered Electrician today, honestly his approach was almost like night and day in comparison. He visited both my mum's home and mine today:
At my mum's: He tested the junction box, he found the earth issue and discover that there were two spurs running off the cooker cable (sorry if I am saying thing incorrectly). He opened up the wooden flooring on the floor above to figure out how to rewire and bring a further cable down to make things safe and came up with a plan to remove all the trunking. Add new and chase new sockets and two light switches. He resolved the cable issue in the loft after testing and coupling them up differently.
At my home: He checked every single socket, changed out three faulty sockets, resolved the issue with the oven from this, narrowed the ring issue down to a cable under the floorboards in the living room.
I am a bit in awe of today.
He will be doing the works at my mum's home later this week.
He mentioned one thing that I hoped I could ask some advice on please. He had a look at the consumer unit that was installed at my home and explained that in the picture attached:
1. The cable thicknesses are incorrect as they are too small
2. The trunking has not been installed correctly
We agreed that he would resolve the fault with the ring continuity and that I would then request the final certificate from the previous electrician and he will provide me with a certificate for the works he has done.
I wanted to ask your thoughts on 1 and 2 in the image and if this is something that I should ask the first Electrician to make right before providing the consumer unit certificate they installed or if it would be okay to ask this Electrician. Or can the cable thicknesses stay as it is?
Thank you all so much for your time and advice, many many thanks, Vanessa