Mark Goodliffe in Action

In case you missed it last year, click here to see the brilliant Mark Goodliffe (aka Mr Magoo) solving one of my puzzles in real time – a rare honour, as he’s much better known as a champion solver of the Times – with a classic penny-dropping moment at 12:15.

Not that Mark managed to spot everything that was to be found in the grid – but who would in 12 minutes?