Finally, a summer holiday for the family that isn’t in Cornwall! The door to No 10 has not long closed and already David and Samantha Cameron are off on an exotic holiday in Corsica.

After years of PR-savvy staycations in Britain, the Camerons have been soaking up the rays at a very luxurious villa.

And what a story the pictures tell. From their chic beach attire to their vastly different physiques, we deconstruct the Camerons’ first holiday after Downing Street.

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After years of PR-savvy staycations in Britain, the Camerons have been soaking up the rays at a very luxurious villa in Corsica

Beach bums: The Camerons' trip to Corsica with their children and four bodyguards is likely to have cost upwards of £15,000

Costa lot in Corsica

Villas on Corsica don’t come cheap. Three to four-bedroom properties with upmarket villa rental company Simpson Travel currently cost up to £11,000 for a week.

But as the Camerons are travelling with an entourage that includes at least four bodyguards — three were spotted on the beach with one patrolling the water on a boat — this suggests their budget may be considerably higher and could be in the region of £15,000.

Flights to the island are limited, giving Corsica an air of exclusivity.

However, the habits of six years in office are hard to kick. Politicians must be seen to have the common touch — so the Camerons flew into the island’s southern airport of Figari with easyJet, where they were met by car and driven the short distance to their villa, with private access to an idyllic stretch of beach just outside the very glossy harbour town of Porto-Vecchio.

Flights to the island are approximately £180 return for an adult and £150 for a child, bringing the Cameron family’s bill for flights alone in at just over £800.

Toweling off: David and Samantha were seen drying off after a dip in the Mediterannean

Sam Cam wore a red-and-purple patterned bikini by lingerie and swimwear specialist Huit

Too many puds, dave?

Perhaps he’s been comfort eating since leaving office. Perhaps he’s simply been enjoying his freedom so much that he hasn’t bothered to adhere to his once strict exercise regime. Whatever the explanation, there is no disguising the expansion of David Cameron’s girth as he heads towards 50.

Mr Cameron, who once described himself as a ‘middle-aged, slightly overweight jogger’, has been frank about his ‘great patriotic struggle’ with his weight, admitting: ‘I’m not as good as Samantha at controlling what goes in. I’m a bit greedier. She is very disciplined.’

Cameron looked as if he had put on a few pounds in recent months

Fitness expert Max Willcocks said: ‘David Cameron does go for his runs, but it looks like he’s been neglecting his health and fitness regime. Then again, I don’t imagine he’s the kind of person who sits down for dinner and says: “I think I will just have the entrée.”’

What about the trainer?

What makes Dave’s bulges all the more noticeable is that for years he benefited from an exclusive deal with celebrity fitness trainer Matt Roberts.

During his time in office he was often spotted running with Roberts around London’s St James’s Park — as was Sam, who is said to have turned to training with Roberts in order to lose the baby weight after the birth of youngest daughter, Florence.

Highly valued clients, the Camerons were given substantial discounts. David declared £21,875 of discounts on 150 sessions with the trainer, while Samantha also received an £850 discount for ten sessions in December 2011.

Cameron donated the money he saved on the sessions to charity.

At least Sam’s still slim

Naturally blessed with a long and lean frame, Sam has clearly worked harder than her husband to maintain her trim physique.

Indeed, a year after giving birth to daughter Florence, five, Sam Cam was back in a bikini.

Consultant plastic surgeon Mark Soldin said: ‘In order to have a flat belly like that after giving birth to four children you would need to be blessed with very good genes and to have had children in the womb who weren’t particularly large, and definitely not twins.’

Naturally blessed with a long and lean frame, Sam has clearly worked harder than her husband to maintain her trim physique

Cameron's decidedly jazzy trunks cost £225 and come from the designer Notting Hill shop Orlebar Brown

In addition to Sam’s personal training sessions with Matt Roberts, Max Willcocks believes she must also attend Pilates or yoga classes to achieve the prominent oblique muscles in her abdomen, sinuous chest and strong, toned arms.

‘The biggest difference between Samantha and her husband is clearly their diet,’ says Willcocks.

‘To have such low body fat as hers, she must be careful about what she eats. I would say that she is meticulous about her diet and probably trains two or three times a week. She looks as if she has been doing Pilates because you can see the core strength that comes from those exercises.’

Splashing out in trendy trunks

No more budget-friendly brands for the former Prime Minister. His decidedly jazzy trunks cost £225 and come from the designer Notting Hill shop Orlebar Brown.

Their design features an arty 1969 image of the swimming pool at the exclusive Hotel du Cap Eden-Roc, in the chic French Mediterranean resort of Antibes.

Taking a dip: Cameron splashed out on his trunks this summer - unlike previous years when he has worn budget swimmers

Their design from Orlebar Brown features an arty 1969 image of the swimming pool at the exclusive Hotel du Cap Eden-Roc, in the chic French Mediterranean resort of Antibes

The Cameron's traded trips to Lanzarote and Cornwall for an expensive holiday to Corsica

It’s all quite a departure from his favoured navy blue Boden trunks of years past.

‘Photographic prints are set to be a big trend for spring/summer 2017 so he’s ahead of the curve,’ said Zeba Lowe, head of fashion at online retailer asos.com.

Anyone watching the politician’s arrival on the beach will, however, have noted that the blue polo shirt that seems to have accompanied him on every summer holiday since he entered office has still got a place in the suitcase.

Bargain bikini

She may be 45 and have given birth to four children, but Samantha Cameron has the beach body of a woman half her age.

In a red-and-purple patterned bikini by lingerie and swimwear specialist Huit, she looked perfectly at ease splashing in the crystal clear waters of Corsica.

Sam is also more frugal than her husband in her beachwear; her choice — named the Tropic Toffy cupped bikini — is on sale at asos.com at £6 (it was £49) for the halterneck top and £3 (reduced from £31) for the bottoms. That means her outfit cost £216 less than her husband’s.

She may be 45 and have given birth to four children, but Samantha Cameron has the beach body of a woman half her age

While she has found a style to suit her — Sam has favoured similar bikinis in the past — Mail style editor Dinah van Tulleken says she could flatter her slim physique even more.

‘With her petite frame she needs to create curves,’ says Dinah. ‘She has made the right choice with her top, the halter-neck broadens her narrow shoulders and the padded bra gives the impression of a fuller bust, but the bikini bottoms are all wrong.

‘This purple palm print set isn’t one of her best.’

Navel gazing

Sam Cam’s artistic credentials are well known. With a tattoo on her ankle and a love of edgy music, she has certainly been Britain’s most bohemian Prime Minister’s wife of recent years.

But could these pictures reveal a further side to her rebellious streak — in the form of a belly button piercing perhaps?

Although the strange dimple seen in photographs seems at first sight to hint at the presence of a navel adornment, it is in fact most likely to be a small lump.