The iron situation is a serious possibility. All my work surface kitchen sockets are LWRF and I had noticed last week that one of the free ones was always switched on which was strange, even after knowing that I had switched it off - as usual I was blaming hubby. It turns out that when we had the new boiler fitted, I had moved the kettle temporarily over to the other side of the kitchen, set a timer for the mornings and lazily not set an end time. If anything had inadvertently been plugged into there then potentially there could have been problems. Luckily for me I don't iron