If we're awake, there's a sort of sound of a 'pop' from the kitchen and then it trips out. This can happen when no one is in the kitchen and there is nothing running.
It can also happen in the middle of the night, when pretty much everything is off.
A trip to the garage, flip the switch and everything is okay, no fuses blown on any equipment and they all work fine, once the fuse breaker switch has been flipped back on.
We can go for a couple of weeks without this happening, and think it has sorted itself, but middle of the night, it went again, which is painful, as the alarm clock is mains powered, so it can't wait until the morning.
Any thoughts on what it might be. My main problem is that it is intermittent. All mechanics and electricians I've come across, hate intermittent faults, because they never show up when they're testing.