Image copyright Instagram @sammacameron

David Cameron and his wife Samantha have marked their wedding anniversary with a picture of their feet.

While his successor Theresa May got to work on the final week of her general election campaign, the former prime minister and his wife were enjoying a holiday in Andalusia, Spain.

Mrs Cameron posted the picture on her Instagram account on Thursday.

She wrote: "Married for 21 years today!"

Many Instagram users congratulated the couple, but not everyone has been so kind. The front page of Friday's Daily Mail declared the picture "toe-curling" and "tacky".

Others have noted how well groomed the pair's naked feet appear.

"Did David get a pedicure too?" asked one Instagram fan.

Mrs Cameron, who launched her fashion label in November, may have taken inspiration from former First Lady Michelle Obama, who posted a similar foot selfie earlier this year to mark Valentine's day .

Image copyright Instagram @michelleobama Image caption Inspiration? Former first lady, Michelle Obama's post from February 2017

The former Conservative MP for Witney has taken a break from Westminster, since giving up his seat in September.

Earlier this year, he bought a £25,000 garden shed in which he plans to write his memoirs.

Image copyright Getty Images Image caption While he was Prime Minister, the Camerons often holidayed closer to home, in Cornwall

The couple, who married in 1996, were introduced by Mr Cameron's sister Clare, Samantha's best friend, at a party at the Cameron family home.

They have three children. Their son Ivan Cameron, who had cerebral palsy and epilepsy, died in hospital aged six in February 2009.