I tell you something that can really spoil my day from the get-go: when I’ve just made my first cup of tea in the morning, and invested patience and craftsmanship squeezing the tea-bag to get it just strong enough but not too strong, and I go to put the milk in, and one of those crusty yellow milk flakes falls off the neck of the milk bottle, into my tea, floats around for a bit, then sinks to the bottom just as I try to fish it out.

That can really spoil my day. I struggle to recover from a blow like that.