Waitrose is taking on Tesco when it comes to price these days - but does Tesco boast the more satisfying salad?

Last week, a shopper found a live frog in her bag of mixed leaves from a Hampshire Waitrose, 24 hours after purchase. The revelation came just a week after it emerged that a Tesco shopper likewise found a live frog in her salad - an amazing four days after buying it.

Tesco simply apologised. But ever-ethical Waitrose promised to find its frog a “suitable” new home - in some garlic butter, perhaps.