Very common occurrence on appliances where the flex is constantly well "flexed" in all directions where it terminates at the appliance or plug. Hair dryers/straighteners/curling tongs are probably the most common but I've seen it on vacuum cleaners too. Your extension lead will be fine, just either get a new hair dryer or rewire the plug.
OK, this is weird. A different hair dryer, in a different socket on the same circuit, just flashed. Changed the fuse and working again. But, coincidence?
Also, I notice the kitchen lights (no others though) dimmed a few times just now while I was in there.
Could there be a problem with the electrics? Consumer unit is new (4 years, and the kitchen lights have always flickered and dimmed a bit) and all on separate circuit and separate side of the consumer unit to the bedrooms though.
Hopefully just a coincidence ... but seems a bit odd. Nothing has changed regarding the electrics in the last few years.
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