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Britain's Prince William is hugged by Chewbacca as British actor John Boyega smiles during a tour of the Star Wars sets at Pinewood studios in Iver Heath, west of London...Britain's Prince William is hugged by Chewbacca as British actor John Boyega smiles during a tour of the Star Wars sets at Pinewood studios in Iver Heath, west of London, Britain on April 19, 2016. Prince William and Prince Harry are touring Pinewood to visit the production workshops and meet the creative teams working behind the scenes on the Star Wars films. REUTERS/Adrian Dennis/Pool

Adrian Dennis/Reuters

Britain’s Prince William is hugged by Chewbacca as British actor John Boyega smiles during a tour of the Star Wars sets at Pinewood studios in Iver Heath, west of London. Prince William and Prince Harry are touring Pinewood to visit the production workshops and meet the creative teams working behind the scenes on the Star Wars films. 

Spring weather Apr 19th 2016...A ship sits out in the North Sea near Tynemouth beach, North Tyneside, just before sunrise. PRESS ASSOCIATION Photo. Picture date: Tuesday April 19, 2016. Photo credit should read: Owen Humphreys/PA Wire

Owen Humphreys/PA

A ship sits out in the North Sea near Tynemouth beach, North Tyneside, just before sunrise

Greenpeace activists scale Nelson's colomn in protest over pollution levels.

Andy Rain/EPA

An activist from the enviromental oganisation Greenpeace attaches a replica gas mask to the face of the statue of Nelson on Nelson’s column during a protest in Trafalgar Square, London. Greenpeace activists scaled numerous statues across the capital to highlight dangerous levels of pollution.

Prime Minister David Cameron helps to campaign for a 'Remain' vote in the forthcoming EU referendum at a phone centre in London today along with fellow pro EU campaigners, Lord Ashdown, Lord Kinnock and Tessa Jowell.  PRESS ASSOCIATION Photo. Picture date: Thursday April 14 2016. Photo credit should read: Stefan Rousseau/PA Wire

Stefan Rousseau/PA

Prime Minister David Cameron helps to campaign for a ‘Remain’ vote in the forthcoming EU referendum at a phone centre in London today along with fellow pro EU campaigners, Lord Ashdown, Lord Kinnock and Tessa Jowell 

Industrial Views Across The Dee Valley...FLINT, WALES - APRIL 13:  The industrial landscape across the Dee Estuary at sunrise as steam rises from Deeside power station, Shotton Steelworks and other heavy industrial plants on April 13, 2016 in Flint, Wales. The British Steel industry has been plunged into crisis after Tata Steel announced it would begin the process of selling its loss-making plants in the UK, putting thousands of jobs at risk.

Christopher Furlong/Getty

The industrial landscape across the Dee Estuary at sunrise as steam rises from Deeside power station, Shotton Steelworks and other heavy industrial plants in Flint, Wales 

A gallery assistant poses with a design ...A gallery assistant poses with a design included in the exhibition "Undressed: A Brief History of Underwear" during a photo call preview at the V&A museum in London, on April 12, 2016.  The exhibition tells the story of underwear design from the 18th century to present day, and runs from 16 April to 12 March 2017. / AFP PHOTO / LEON NEAL / RESTRICTED TO EDITORIAL USE - MANDATORY MENTION OF THE ARTIST UPON PUBLICATION - TO ILLUSTRATE THE EVENT AS SPECIFIED IN THE CAPTIONLEON NEAL/AFP/Getty Images

Leon Neal/AFP/Getty

A gallery assistant poses with a design included in the exhibition “Undressed: A Brief History of Underwear” during a photo call preview at the V&A museum in London 

Craig Watson/PA

Hannah Miley wins her heat in the Women’s Open 400m IM during day one of the British Swimming Championships at Tollcross International Swimming Centre, Glasgow 

A Christie's employee holds 'The Mendes-France Baule Mask' from Ivory Coast at Christies's auction rooms in London, Monday, April 11, 2016. The mask is estimated to realise 500,000-800,000 US dollars (355,537-568,858 UK pounds) when it is auctioned in New York in the Post War and Contemporary Afternoon sale on May 11. (AP Photo/Kirsty Wigglesworth)

Kirsty Wigglesworth/AP

A Christie’s employee holds ‘The Mendes-France Baule Mask’ from Ivory Coast at Christies’s auction rooms in London. It will be auctioned in New York at the ‘Evolution of Form: African & Oceanic Art at the Genesis of Modernism’ on May 12 

Wellington Arch sculpture conservation...Freelance sculpture conservator Scarlett Hutchin, working for English Heritage, buffs wax polish applied to  artist Adrian Jones' sculpture, Quadriga, on top of Wellington Arch at Hyde Park Corner, depicting four horses, representing the forces of chaos and war pulling a chariot, being calmed by the angel of peace, as the landmark sculpture is being cleaned, repaired and re-waxed by a team of specialists as part of a major English Heritage conservation programme. PRESS ASSOCIATION Photo. Picture date: Thursday April 7, 2016. See PA story HERITAGE Quadriga. Photo credit should read: Nick Ansell/PA Wire

Nick Ansell/PA

Freelance sculpture conservator Scarlett Hutchin, working for English Heritage, buffs wax polish applied to artist Adrian Jones’ sculpture, Quadriga, on top of Wellington Arch at Hyde Park Corner. The landmark sculpture is being cleaned, repaired and re-waxed by a team of specialists as part of a major English Heritage conservation programme

Grand Opening Day - Crabbie's Grand National Festival - Aintree Racecourse...Viconte Du Noyer ridden by jockey Jonathan Burke in the Betfred Red Rum Handicap Chase during the Grand Opening Day of the Crabbie's Grand National Festival at Aintree Racecourse, Liverpool. PRESS ASSOCIATION Photo. Picture date: Thursday April 7, 2016. See PA story RACING Aintree. Photo credit should read: Mike Egerton/PA Wire

Mike Egerton/PA

Viconte Du Noyer ridden by jockey Jonathan Burke in the Betfred Red Rum Handicap Chase during the Grand Opening Day of the Crabbie’s Grand National Festival at Aintree Racecourse, Liverpool

Junior Doctors Stage A Further 48 Hour Strike Over Proposed Contract Changes...LONDON, ENGLAND - APRIL 06:  Junior doctors and staff members take part in a strike outside St Thomas' Hospital on April 6, 2016 in London, England. Junior doctors in England are currently taking part in a 48 hour strike, their fourth in their long-running dispute with the government over contract changes. Doctors are again providing emergency cover but 4,000 operations and procedures have been postponed.  (Photo by Dan Kitwood/Getty Images)

Dan Kitwood/Getty

Junior doctors and staff members take part in a strike outside St Thomas’ Hospital on in London, England. Junior doctors in England are currently taking part in a 48 hour strike, their fourth in their long-running dispute with the government over contract changes.

Carl Court/Getty

Labour leader, Jeremy Corbyn, gestures at a baby as he speaks with customers during a visit to a cafe in Harlow, England. Mr Corbyn visited the Essex town to launch Labour Party’s local election campaign

Tata Prepares To Sell British Steel Operation

Christopher Furlong/Getty Images

A man walks his dog on Aberavon beach in the shadow of the Tata Steel plant at Port Talbot on Wednesday. Indian owners Tata Steel put its British business up for sale yesterday, placing thousands of jobs at risk and hitting the already floundering UK steel industry.

University of Edinburgh student Kengo Shibata is photographed through the "Six Planet"  Kaleidoscope which will be part of an exhibition of Kaleidoscopes celebrating the 200th anniversary of the instrument's invention. PRESS ASSOCIATION Photo. Picture date: Wednesday March 30, 2016. The exhibition, presented by the Japan Kaleidoscope Museum and the Universities of Edinburgh and St Andrews, is part of Edinburgh International Science Festival which runs in the Playfair Library in Edinburgh from 3-5 and 7-10 of April. Photo credit should read: Andrew Milligan/PA Wire

Andrew Milligan/PA Wire

University of Edinburgh student Kengo Shibata is photographed today through the “Six Planet” Kaleidoscope which will be part of an exhibition of Kaleidoscopes celebrating the 200th anniversary of the instrument’s invention. The exhibition, presented by the Japan Kaleidoscope Museum and the Universities of Edinburgh and St Andrews, is part of Edinburgh International Science Festival which runs in the Playfair Library in Edinburgh from 3-5 and 7-10 of April.

A City worker shields his eyes from the sun outside of the Bank of England in the City of London, Britain, March 29, 2016. The Bank of England could be pulled in very different directions if British voters take the historic step of leaving the European Union in a referendum set for June 23.. REUTERS/Toby Melville

Toby Melville/Reuters

A City worker shields his eyes from the sun outside of the Bank of England in the City of London, Britain today.

Airlander 10 unveiled ...The Airlander 10 airship, the world's largest aircraft, is unveiled for the first time since being fully assembled at Cardington hanger in Bedfordshire. PRESS ASSOCIATION Photo. Picture date: Monday March 21, 2016. The 302ft (92m) long part plane, part airship was first developed for the US government as a long-endurance surveillance aircraft. See PA story AIR Airlander. Photo credit should read: Chris Radburn/PA Wire

Chris Radburn/PA

The Airlander 10 airship, the world’s largest aircraft, is unveiled for the first time since being fully assembled at Cardington hanger in Bedfordshire. The 302ft long part plane, part airship was first developed for the US government as a long-endurance surveillance aircraft. 

Cheltenham Festival...Horse Racing - Cheltenham Festival - Cheltenham Racecourse - 18/3/16  Racegoers watch the 1.30 JCB Triumph Hurdle  Action Images via Reuters / Andrew Boyers  Livepic

Andrew Boyers/Livepic/Reuters

Racegoers watch the 1.30 JCB Triumph Hurdle at Cheltenham Festival, England 

Charlie Bibby/Financial Times

Charlie Bibby/Financial Times

Robert Bushell, Captain of the MBNA Thames Clippers which ferries commuters and tourists up and down the river Thames, London. Bushell finds the morning shifts a struggle, especially the earliest which requires waking up at 2.30am to arrive at 4am. But once out of bed, he likes being out on the river so early. “It’€™s really peaceful he says, aside from the occasional tugboat or engineer surveying and repairing the bridges”. View the full photo story about the people who work on the river. 

Royal visit to Cavalry Barracks - Hounslow...Members of the Irish Guards during a visit by the Duke of Cambridge to the regiment's St Patrick's Day parade at Cavalry Barracks in Hounslow, west London. PRESS ASSOCIATION Photo

Heathcliff O'Malley/The Daily Telegraph/PA

Members of the Irish Guards during a visit by the Duke of Cambridge to the regiment’s St Patrick’s Day parade at Cavalry Barracks in Hounslow, west London 

Britain's Finance Minister George Osborn...Britain's Finance Minister George Osborne is pictured as he watches pupils during a netball lesson at St Benedict's Catholic Primary School in Garforth, north east England, on March 17, 2016. Britain unleashed more austerity on Wednesday March 16, 2016, in its latest annual budget and cut its growth outlook, blaming the impact of global market turbulence rooted in China.  / AFP PHOTO / POOL / DARREN STAPLESDARREN STAPLES/AFP/Getty Images

Darren Staples/AFP

Britain’s Finance Minister George Osborne is pictured as he watches pupils during a netball lesson at St Benedict’s Catholic Primary School in Garforth. Britain unleashed more austerity on Wednesday in its latest annual budget and cut its growth outlook, blaming the impact of global market turbulence rooted in China