Yes and yes.
It would only be moderately inconvenient to have to avoid running both appliances simultaneously, so I can live with the situation for the time being. I believe that the circuit is safe (ie the cable could cope with the max load of both appliances), just over-protected at...
It is marked "15" only, type is not specified (sorry, didn't notice this before, it's on the end of the switch so not very visible from below when the switch is on (up)) . Makes sense that this wpuld be overloaded by an 18A max load from the appliances. Looking at this CU again I am thinking it...
If I could have afforded to employ tradesmen on this job I would have done so. As I could not, I did not, and so here I am on a DIY forum... Apart from a few additional sockets on a ring this was all like-for-like replacement (except (oops) I have replaced the previous single socket on this...
I've just redone my kitchen, including the wiring. There was an existing radial circuit (labelled "wash boiler" at the CU) with a single socket on it which I have reused for an under-sink double socket for the dishwasher and washing machine. I have put in a 13A FCU above the worktop to isolate...