Brain training. That’s what. All three have leant their names to brain-boosting software.

Baroness Greenfield, the prominent neuroscientist and Director of the Royal Institution, is endorsing MindFit for the PC, a scientifically tested bit of software that limbers up the mind with interactive puzzles. Greenfield told the Times how looking after your body as you age is not the only requirement for good health.

“What concerns me is preserving the brain too,” she said. “There is now good scientific evidence to show that exercising the brain can slow, delay and protect against age-related decline.”

Should come in handy amongst her peers in the House of Lords, where the average age is 68 years.