Inexplicable boxes in the cupboard

I confined myself to quarters today, along with the Horrible Cough. Not a good day for something to have gone awry with the heating.

It's not what I'd call a system - more a series of random boxes that may or may not be attached to each other. That clock-like thing seems to have stopped working, if it ever did - but surely the storage heaters are triggered to come on when the electricity changes to the cheap(er) tariff? Or maybe not. The whole mess may date from 1985 - there's an attempt at a diagram circa 1997 stuck to the wall above, under the coats, when some work may (or may not) have been done replacing the old storage heaters, that tries to identify which of the many fuses apply to what appliances. It has more question marks than information on it.

Oh, well, we've switched the clock switch to "constant" in the hope that something will heat up at some point even if it costs us an arm and a leg. Meanwhile we're going to retreat to the sofa and huddle under the duvet, slowly digesting the delicious roast chicken dinner that DH kindly cooked.