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