Slightly burned neutral

[Worrier61]

Update.
Many thanks everyone. I have replaced the dirty plug and socket. I was lucky to have same make so the holes were in exactly same place so it really was a dream to replace socket. I realise the short extension is not ideal. I will take a good look at this next time the appliances have to come out (which won't be long in this world where nothing is made to last). I will keep a regular eye on socket and only be running one of the appliances, not both together.
May I ask if the kettle needs a new home or is it OK living in same double socket. I don't know how powerful a kettle is compared to a washing machine.
I could put the kettle in the hob socket see picture but that's not ideal as the cooker normally lives there.

 

[BlueLoo]

Power=Voltage xAmps.
Or, Amps =Power/voltage.

As we don't know the rating of your kettle, etc, it's hard to answer accurately but you can use the above formula to work out the amps.

For a 3kw kettle, you have 3000/240 = 12.5amps which is no coincidence that it's a 13a plug.

Ignoring voltage swing obv.

Washing machine is probably 10 amps (guess) at max.

So > 20amps. Which is apparently not great.

https://www.boards.ie/discussion/2057177536/how-much-power-can-be-got-from-a-socket

However, the plug is utterly separate from the socket? your issue was one of individual plug load rather than total socket load.

I think normal practice is to avoid heavy, long loads on both sockets at the same time.

Just my thoughts though. Others may know better.