Re: never seems to taste the same?
"Very bad plan.
A circuit breaker appropriate for a dryer will provide no protection for the puny wiring of a kettle, in the event of a short, making for an 'out of design specs' fire hazard."
Actually it wouldn't matter nor cause any fire hazard. Reason kettle is a resistive load so doesn't need overload protection, just short circuit protection. Ditto electric showers (Though as an ex spark, I have a mixer shower as standing wet on an earthed metal bath whilst under an electric shower goes against the grain somewhat....touch voltage (i.e. that required to penetrate your skin) drops from 50V AC dry down to < 25V AC when your soaking wet.)
Whether you could terminate the dryer cables into a uk socket might be another matter. Though you could just run a flex cable of carrying 13 amps from the breaker panel to a single UK socket (current then limited to 13amps.) 1.25mm2 would cover it though 1.5mm2 is more commonly found, translated to North American as 16AWG, for a longer run, use 2.5mm2 / 14AWG to reduce volt drop.
Inductive loads are a different matter however......that could go horribly wrong.