Mr Hughes,
I have sympathy for you, as I moved recently and had a not dissimilar problem.
The kitchen has a gas hob that has only two working electric ignitors and in fairness the landlord has said that he will resolve that issue - maybe a replacement hob. Now personally we prefer an electric hob, so I agreed with the landlord that if we supply the hob, he will let me fit it. So far so good, however....
When I pulled the oven unit out, I find that some **** has installed 2.5 T&E when the house was rewired 5 years ago, and the hob requires a 27A supply. The circuit MCB has been downrated to 20A
Speak to the landlord and tell him that his cooker circuit is not suitable and will need an upgrade, and offer to do the work. However the landlord's Agent has told him in no uncertain terms never to allow a tenant to do any work whatsoever.
So on Monday the landlord's electrician shows up - only an hour and a half late - tells me that it is fine to use 2.5 T&E on a cooker circuit on the basis as the Landlord must have agreed to this when the oven and hob were installed. He decides it will take a day and a half to do the work and obviously the landlord's view on the cost quoted is why should he pay for us wanting an electric hob. I am pretty certain based on the conversations that this is the electrician who fitted this arrangement
Now I have never seen a cooker cct ever wired in to less than a 30 or 45 Amp supply and without a copy of the 17th or I cannot confirm what the requirement is for Cooker circuits and whether or not there is sufficient grounds to claim that it should have been installed to facilitate a high demand cooker. As I see it the cct MCB has been downrated and although not ideal, there is no safety issue here.
Currently I am trying to negotiate that I do the work and the landlords electrician do the testing.
Frankly it leaves a poor taste in the mouth but I am sitting with an electric hob and a wife who does not like gas. Irrespective of that I am going to have to spend my time and money bringing the cooker cct up to the required standard when this is something I should never have to do.
On the basis that the electrician turned up without a MFM and left his voltage tester at a previous job, and so worked live on the other repair jobs I wonder what other little gems await.
Unfortunately the landlord thinks the world to this long established electrician, who from what I gather has not even brought himself up-to-date with the new 18th Edition, and who charges a lot of money for crap like that.
So my friend you have my sympathies and unless you pay for it yourself or can reach an agreement with the landlord you may have to find somewhere else - or get a small generator