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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Pompeii, Capri & the Bay of Naples
Seven Cities of Italy
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Lake Garda
Minoan Crete and Santorini
Prices correct as of 17 April 2015
Not even the 'putrid throat' could stop the Ross Poldark swoon-fest'

Not even the 'putrid throat' could stop the Ross Poldark swoon-fest'

How a costume drama became a Sunday night staple
Miliband promises no stamp duty for first-time buyers as he pushes Tories on housing

Miliband promises no stamp duty for first-time buyers

Labour leader pushes Tories on housing
Aviation history is littered with grand failures - from the the Bristol Brabazon to Concorde - but what went wrong with the SuperJumbo?

Aviation history is littered with grand failures

But what went wrong with the SuperJumbo?
Fear of Putin, Islamists and immigration is giving rise to a new generation of Soviet-style 'iron curtains' right across Europe

Fortress Europe?

Fear of Putin, Islamists and immigration is giving rise to a new generation of 'iron curtains'
Never mind what you're wearing, it's what you're reclining on

Never mind what you're wearing

It's what you're reclining on that matters
General Election 2015: Chuka Umunna on the benefits of immigration, humility – and his leader Ed Miliband

Chuka Umunna: A virus of racism runs through Ukip

The shadow business secretary on the benefits of immigration, humility – and his leader Ed Miliband
Yemen crisis: This exotic war will soon become Europe's problem

Yemen's exotic war will soon affect Europe

Terrorism and boatloads of desperate migrants will be the outcome of the Saudi air campaign, says Patrick Cockburn
Marginal Streets project aims to document voters in the run-up to the General Election

Marginal Streets project documents voters

Independent photographers Joseph Fox and Orlando Gili are uploading two portraits of constituents to their website for each day of the campaign
Game of Thrones: Visit the real-life kingdom of Westeros to see where violent history ends and telly tourism begins

The real-life kingdom of Westeros

Is there something a little uncomfortable about Game of Thrones shooting in Northern Ireland?
How to survive a social-media mauling, by the tough women of Twitter

How to survive a Twitter mauling

Mary Beard, Caroline Criado-Perez, Louise Mensch, Bunny La Roche and Courtney Barrasford reveal how to trounce the trolls
Gallipoli centenary: At dawn, the young remember the young who perished in one of the First World War's bloodiest battles

At dawn, the young remember the young

A century ago, soldiers of the Empire – many no more than boys – spilt on to Gallipoli’s beaches. On this 100th Anzac Day, there are personal, poetic tributes to their sacrifice
Dissent is slowly building against the billions spent on presidential campaigns – even among politicians themselves

Follow the money as never before

Dissent is slowly building against the billions spent on presidential campaigns – even among politicians themselves, reports Rupert Cornwell
Samuel West interview: The actor and director on austerity, unionisation, and not mentioning his famous parents

Samuel West interview

The actor and director on austerity, unionisation, and not mentioning his famous parents
General Election 2015: Imagine if the leading political parties were fashion labels

Imagine if the leading political parties were fashion labels

Fashion editor, Alexander Fury, on what the leaders' appearances tell us about them
Phumzile Mlambo-Ngcuka: Home can be the unsafest place for women

Phumzile Mlambo-Ngcuka: Home can be the unsafest place for women

The architect of the HeForShe movement and head of UN Women on the world's failure to combat domestic violence