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I’m not comfortable with the fact downstairs sockets and the kitchen are all on a 16a what do you think.

Nor would I be. Kettle and a toaster alone are likely to cause an overload and trip!
The readings for a radial are possibly ok but if a significant jump in Zs between sockets (unless long run of cable) then further investigation required as previously suggested.
As it is an EICR recommend upgrading to
 
Nor would I be. Kettle and a toaster alone are likely to cause an overload and trip!QUOTE]

A little pedantic of me but if it's a fairly typical kettle (3kw rating) and toaster (2kw rating) then they may not cause the MCB to trip at all as they will be pulling up to 21.73A max and (from memory so could be slightly off) MCBs must, as a minimum, trip at 1.45 times their rating in under an hour, in this instance 23.2A, so 21.73A may not be enough to make it trip ever, let alone within the 5 minutes the kettle is on.
 
I had to split a ring final in a non domestic premises last week, open cpcs which could not be rectified. Ended up with five outlets on one, seven on the other. Zs for one 0.64 the other 1.66. The low reading the first part of the circuit the high one went all the way over and back to the middle.
 
Electric Magic said - A little pedantic of me.

Just a bit I could have used 'dishwasher' and 'washing machine' as an example but you get the picture!
 
Thanks again for your comments. Just to update. I called the previous owner and asked if they could shed any light and after 10 minutes of uming and aring told me that he had an issue with the downstairs ring so the electrician he used cut one leg of the RFC and layed another cable to it and the rest is still on with the kitchen 16a
 

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