CAN A LAVATORY FLUSH ever be beautiful? Yes, when it’s as elegantly understated as this one. No words are needed: the large and small buttons express their purpose without text, and so without any coy euphemisms.

Compare the simplicity and sophistication of that flush with this awkward mishmash on Brittany Ferries. The button should be obvious enough to do all the work on its own; but the lack of clarity requires not just any old label, but an ugly, badly designed three-language label that lays on the explanation with a trowel.