Use your favourite low current but mains controlling thing and add a contactor, eg https://www.screwfix.com/p/british-general-fortress-20a-dp-contactor-no/6654P
That’s an idea of course, however I was looking for a slightly neater solution as it’s on wall in our kitchen and adding additional electrical boxes might upset the boss.
Does the contactor need to be near the switch though?
@Colm89 started
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Use your favourite low current but mains controlling thing and add a contactor, eg https://www.screwfix.com/p/british-general-fortress-20a-dp-contactor-no/6654P