The bigger the text, the harder it is to spot the mistake – as this online banner from Barclays Bank proves.

As most six-year-olds know, verbs and nouns should agree. ‘Overdrafts’ is plural so we’d expect to hear that they ‘heal’ glitches, not that they ‘heals’ them…

While we’re about it, how do you heal a glitch anyway? Why not ‘help your cashflow recover from a little knock’ or similar?

Barclays digital marketers, you can reach me on 01603 454111. And remember: if the designer types it, you check it.