Terri Powis, 33, bought the 98p own-brand bag of spinach to enjoy with their chicken dinner – so it wasn’t a mice surprise to find the perfectly-preserved rodent’s head as she defrosted the vegetable in a steamer.

She didn’t notice Roland to begin with, but as the leaves began to defrost the severed head slowly emerged from the spinach.

“It didn’t even cross my mind that it was the head of a rat,” said Ms Powis, who bought the spinach at her local Asda branch in High Wycombe. “I was poking around with it because I didn’t know what it was. I was gob-smacked when I realised what it was – it was horrible,” she added, according to the Daily Telegraph.

“It was very fresh and really pink. It was a bit squashed but intact and must have been frozen soon after being severed.”

An Asda spokesman said: “We’d like to apologise for any upset caused to Ms Powis, and we will work closely with the local authorities whilst they conduct their investigation.”

Anyone fancy ratatouille?