Footage captured for the BBC One documentary Dolphins: Spy in the Pod showed the marine mammals chewing on puffer fish in order to get 'high'

Dolphins ‘deliberately get high’ on puffer fish nerve toxins by carefully chewing and passing them around

Extraordinary scenes filmed for new documentary showing the marine mammals in their natural habitats

What the Sunday papers said

Independent on Sunday: IT firms lose billions after NSA scandal

American technology firms have lost billions of dollars of business from Asia in the wake of the National Security Agency scandal. Financial filings from IBM and Cisco reveal the two have seen sales slump by more than $1.7bn (£1.03bn) year-on-year in the key Asia-Pacific region as governments and businesses shun American IT firms.

What the Sunday papers say

Independent on Sunday: Duke may be called as witness in property deal

The Duke of Westminister could be called as a witness in a multimillion-pound legal wrangle over a house he sold in London’s Eaton Square, in 2007. The house was sold on in 2010 for £20.5m, and the proceeds from that 2010 sale have been frozen by a court order. There is no suggestion of wrong-doing on the part of the Duke.

Andrew Marr (left) and Vince Cable appearing on BBC1's The Andrew Marr Show - the Business Secretary accused the Conservatives of 'panicking' about immigration because the party is under pressure from UKIP

Vince Cable likens Conservative 'panic' over immigration to Enoch Powell's notorious 'rivers of blood' speech

Coalition tensions boiled over as the Liberal Democrat Cabinet minister Vince Cable likened Conservative “panic” about Romanian and Bulgarian migration to Enoch Powell’s notorious “rivers of blood” speech.

Today women are spoilt for choice in terms of sporting role models like cyclist Laura Trott

Ashling O'Connor: How long before a woman is deemed capable of managing a top men’s side?

The FA’s decision to appoint a male coach of the England women’s  football team shows progress – but there’s still a long way to go

Billionaire Reuben brothers bank £600m from Global Switch bond fundraiser

The billionaire Reuben brothers are set to cash £600 million from the refinancing of data centre operator Global Switch.

Andy McSmith's Diary: A Christmas-card character mash-up from Parliament

Most Christmas cards from MPs are worthy, if dull, but one or two try to break away and do something notable, usually landing their senders in trouble in the process.

South Africa's deaf community has accused the sign language interpreter at Nelson Mandela's memorial of being 'fake'

Nelson Mandela sign language interpreter ‘helped burn two men to death’

The South African government has launched an investigation into who hired the ‘fake’ interpreter Thamsanqa Jantjie, and how he passed security checks

Lord Mackenzie and Lord Laird will not be able to sit in the House of Lords for months

Two peers suspended from the House of Lords after offering to do paid work for undercover reporters

Lord Mackenzie and Lord Laird both face temporary bans after being caught by Sunday Times journalists

Theresa May said slavery was a 'harsh reality' of modern Britain

Modern Slavery Bill: 'Appalling' human traffickers to receive life sentences under draft legislation

Home Office confirms Bill will be published on same day Theresa May receives evidence from MPs and experts, who urged her to 'make the most of the opportunity' to change the law

RSA faces takeover pressure as chief executive Simon Lee quits

RSA warned it will need to set aside another £130 million to pay out for personal injury claims in its Irish unit

Obama, Cameron and Thorning-Schmidt cosy up for the selfie at Nelson Mandela’s memorial service

David Cameron pleads with Danish Prime Minister not to delete their Mandela selfie

Mr Cameron suggested the picture could be sold to raise money for charity instead, reports say

75,000 EU migrants cap proposed

Immigration from European Union countries could be capped at 75,000 under proposals set out by the Home Office for sweeping changes to the relationship with Brussels.

Following a review into seven day care, hospitals that do not provide the same standard of care at the weekend as during the week will be fined

Have senior doctors work at weekends or face huge fines, hospitals told

The days of hospitals relying on junior doctors at the weekend are numbered, the director of NHS England has said

Kate Barry: Daughter of Jane Birkin and John Barry found dead after fall from Paris apartment

Ms Barry, who was a photographer who had been published in Vogue and the Sunday Times, was reportedly found dead on the pavement beneath her flat

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Day In a Page

Burgundy, the River Rhone & Provence – MS Swiss Corona - seven nights from £999pp
Lake Maggiore, Orta and the Matterhorn – seven nights from £899pp
Sicily – seven nights from £939pp
Pompeii, Capri and the Bay of Naples - seven nights from £799pp
Istanbul Ephesus & Troy – six nights from £859pp
Mary Rose – two nights from £319pp
Ukraine crisis: The phoney war is over as Russian troops and armour pour across the border

The phoney war is over

Russian troops and armour pour into Ukraine
Potatoes could be off the menu as crop pests threaten UK

Potatoes could be off the menu as crop pests threaten UK

The world’s entire food system is under attack - and Britain is most at risk, according to a new study
Gangnam smile: why the Chinese are flocking to South Korea to buy a new face

Gangnam smile: why the Chinese are flocking to South Korea to buy a new face

Seoul's plastic surgery industry is booming thanks to the popularity of the K-Pop look
From Mozart to Orson Welles: Creative geniuses who peaked too soon

Creative geniuses who peaked too soon

After the death of Sandy Wilson, 90, who wrote his only hit musical in his twenties, John Walsh wonders what it's like to peak too soon and go on to live a life more ordinary
Caught in the crossfire of a cyber Cold War

Caught in the crossfire of a cyber Cold War

Fears are mounting that Vladimir Putin has instructed hackers to target banks like JP Morgan
Salomé's feminine wiles have inspired writers, painters and musicians for 2,000 years

Salomé: A head for seduction

Salomé's feminine wiles have inspired writers, painters and musicians for 2,000 years. Now audiences can meet the Biblical femme fatale in two new stage and screen projects
From Bram Stoker to Stanley Kubrick, the British Library's latest exhibition celebrates all things Gothic

British Library celebrates all things Gothic

Forthcoming exhibition Terror and Wonder: The Gothic Imagination will be the UK's largest ever celebration of Gothic literature
The Hard Rock Café's owners are embroiled in a bitter legal dispute - but is the restaurant chain worth fighting for?

Is the Hard Rock Café worth fighting for?

The restaurant chain's owners are currently embroiled in a bitter legal dispute
Caribbean cuisine is becoming increasingly popular in the UK ... and there's more to it than jerk chicken at carnival

In search of Caribbean soul food

Caribbean cuisine is becoming increasingly popular in the UK ... and there's more to it than jerk chicken at carnival
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11 best face powders

Sweep away shiny skin with our pick of the best pressed and loose powder bases
England vs Norway: Roy Hodgson's hands tied by exploding top flight

Roy Hodgson's hands tied by exploding top flight

Lack of Englishmen at leading Premier League clubs leaves manager hamstrung
Angel Di Maria and Cristiano Ronaldo: A tale of two Manchester United No 7s

Di Maria and Ronaldo: A tale of two Manchester United No 7s

They both inherited the iconic shirt at Old Trafford, but the £59.7m new boy is joining a club in a very different state
Israel-Gaza conflict: No victory for Israel despite weeks of death and devastation

Robert Fisk: No victory for Israel despite weeks of devastation

Palestinians have won: they are still in Gaza, and Hamas is still there
Mary Beard writes character reference for Twitter troll who called her a 'slut'

Unlikely friends: Mary Beard and the troll who called her a ‘filthy old slut’

The Cambridge University classicist even wrote the student a character reference
America’s new apartheid: Prosperous white districts are choosing to break away from black cities and go it alone

America’s new apartheid

Prosperous white districts are choosing to break away from black cities and go it alone