London

Members of the emergency services take part in Exercise Strong Tower outside the disused Aldywch tube station on Surrey Street onTuesday in London, England.  The counter-terrorism training exercise will involve as many as 1,000 officers and will take place across the city until Wednesday afternoon

Rob Stothard/Getty Images

Members of the emergency services take part in Exercise Strong Tower outside the disused Aldywch tube station on Surrey Street on Tuesday in London, England

A member of ground staff updates a fixtures board on day two of Wimbledon tennis tournament on June 30, 2015 in London, England. The 129th tournament to be hosted at Wimbledon is due to run for two weeks from Monday 29th June

Carl Court/Getty Images

A member of ground staff updates a fixtures board on day two of Wimbledon tennis tournament on Tuesday in London, England. The 129th tournament to be hosted at Wimbledon is due to run for two weeks

A man takes his jacket off as he settles into his deck chair on a sunny day in St. James Park in London, Britain on Wednesday

Suzanne Plunkett/Reuters

A man takes his jacket off as he settles into his deckchair on a sunny day in St James’s Park, London

Luisa Avietti puts the finishing touches to a mural of Ed Sheeran made out of 13,000 ticket stubs, which has been created by StubHub to celebrate the British singer being revealed as the hottest act appearing in the UK this summer, in London's Russell Square. PRESS ASSOCIATION Photo. Picture date: Monday June 22, 2015. Photo credit should read: David Parry/PA Wire

David Parry/PA

Luisa Avietti puts the finishing touches to a mural of Ed Sheeran made out of 13,000 ticket stubs, which has been created by StubHub to celebrate the British singer being revealed as the hottest act appearing in the UK this summer, in London’s Russell Square 

Race-goers relax on a bench displaying the Union Flag on the first day of the annual Royal Ascot horse racing event near Windsor, west of London, on June 16, 2015.

Ben Stansall/AFP

Racegoers relax on a bench displaying the Union Jack on the first day of the Royal Ascot meeting in Berkshire, England.

 A student gives flowers to, embraces and welcomes with other young students US First Lady Michelle Obama in the courtyard before an event as part of the 'Let Girls Learn Initiative' at the Mulberry School for Girls on Tuesday in London, England. The US First Lady is travelling with her daughters, Malia and Sasha and her mother, Mrs. Marian Robinson, to continue a global tour promoting her 'Let Girls Learn Initiative'. The event at the school was to discuss how the UK and USA are working together to expand girl's education around the world

Jeff J Mitchell/Getty Images

A pupil embraces US First Lady Michelle Obama before an event at the Mulberry School for Girls in London, part of the Let Girls Learn Initiative.

Re-enactors dressed as soldiers from the era of the Battle of Waterloo travel on an escalator after attending a memorial unveiling at Waterloo Station in London, Wednesday, June 10, 2015. The new war memorial honours all of the allied forces who fought at the Battle of Waterloo in 1815. The centrepiece is a giant replica of the reverse of the Waterloo Campaign medal

Kirsty Wigglesworth/AP

Re-enactors dressed as soldiers from the era of the Battle of Waterloo travel on an escalator after attending a memorial unveiling at Waterloo Station in London on Wednesday. The new war memorial honours all of the allied forces who fought at the Battle of Waterloo in 1815

Campaigners calling for the introduction of a Robin Hood Tax dressed as Chancellor George Osborne and city bankers take part in a demonstration outside Mansion House, in the City of London, ahead of Lord Mayor of the City of London's annual Bankers and Merchants Dinner, attended by Chancellor George Osborne and Governor of the Bank of England Mark Carney

Dominic Lipinski/PA

Campaigners calling for the introduction of a Robin Hood Tax dressed as Chancellor George Osborne and city bankers take part in a demonstration outside Mansion House, in the City of London, ahead of Lord Mayor of the City of London’s annual Bankers and Merchants Dinner, attended by Chancellor George Osborne and Governor of the Bank of England Mark Carney on Wednesday

Two gallery assistants pose with '$, 2001' an installation by Tim Noble and Sue Webster which is going on show at Sotheby's with an estimated value of  100,000- 150,000 on June 8, 2015 in London, England. The installation forms part of an exhibition of 21 works inspired by the US Dollar which are estimated to have a total value of  50 million and will go under offer by the auction house on 1st and 2nd July 2015

Mary Turner/Getty Images

Two gallery assistants pose with ‘$, 2001′ an installation by Tim Noble and Sue Webster which is going on show at Sotheby’s with an estimated value of £100,000- £150,000 on Monday in London, England

Australia's Steve Sommerfeld performs a jump on his motocross bike backdropped by the O2 Arena during a promotional event in London, Tuesday, June 2, 2015.  The publicity stunt Tuesday was to promote the freestyle motocross world tour event "Night of the Jumps" which takes place inside the O2 Arena on September 5

Matt Dunham/AP

Australia’s Steve Sommerfeld performs a jump on his motocross bike with the O2 Arena int eh background, during a promotional event in London on Tuesday

Members of the East German Ladies' swimming team leave the new 'King's Cross Pond Club' outdoor swimming pool on Friday in London, England. The 40 metre pool is purified using submerged plants to filter the water and is surrounded by flowers and plants. It is open to members of the public Monday and Friday between 6am and dusk

Dan Kitwood/Getty Images

Members of the East German Ladies’ swimming team leave the new ‘King’s Cross Pond Club’ outdoor swimming pool on Friday in London, England. The 40 metre pool is purified using submerged plants to filter the water and is surrounded by flowers and plants

A visitor shelters under her umbrella as she makes a phone call at  the Royal Horticultural Soceity's Chelsea Flower Show in London, Britain, May 18, 2015

Toby Melville/Reuters

A visitor shelters under her umbrella as she makes a phone call at the Royal Horticultural Society’s Chelsea Flower Show in London, UK

David Hockney presents his new body of work at the Annely Juda gallery, Mayfiar, London

Charlie Bibby/FT

David Hockney presents his new body of work at the Annely Juda gallery, Mayfair, London on Thursday

The Viking Star going through the Thames Barrier in London as part of its maiden voyage. PRESS ASSOCIATION Photo. Picture date: Tuesday May 12, 2015. The delivery ceremony took place on March 28th when the ship was presented at Fincantieri s Marghera shipyard outside of Venice, Italy. On April 11th, Viking Star set sail from Istanbul making her way through the Mediterranean into the Atlantic on her way to be officially christened in Bergen, Norway on May 17th. Classified by Cruise Critic as a  small ship,  the all-veranda Viking Star has a gross tonnage of 47,800 tons, 465 cabins and will accommodate 930 passengers. It is engineered to allow direct access into most ports, so guests have an easy and efficient embark and debark. The Viking Star is one of three ocean cruise ships on order; the remaining two ships, Viking Sea and Viking Sky, are currently under construction

Viking Ocean Cruises/Jeff Moore/PA

The Viking Star going through the Thames Barrier in London as part of its maiden voyage on Tuesday

Anthony Devlin/PA

Larry the cat waits outside 10 Downing Street, London

Justin Tallis/AFP/Getty

Nuns leave a polling station after voting in London as Britain holds a general election. Polls opened today in Britain’s closest general election for decades with voters deciding between the Conservative party, headed by prime minister David Cameron; the Labour party, headed by Ed Miliband and a host of smaller parties.

Conservative Party supporters wear Nicola Sturgeon masks during a photocall in Victoria Tower Gardens on Friday in London, England. The stunt was to warn of the risk of any possible coalition between the Labour Party and the SNP

Dan Kitwood/Getty Images

Conservative Party supporters wear Nicola Sturgeon masks during a photocall in Victoria Tower Gardens on Friday in London, England. The stunt was to warn of the risk of any possible coalition between the Labour Party and the SNP

A woman runs past artwork of a large hand on a wall in central London, Britain on Monday

Stefan Wermuth/Reuters

A woman runs past artwork of a large hand on a wall in central London, UK, on Monday

A performer takes part in an unveiling of a billboard against fracking in central London, Britain on Monday

Stefan Wermuth/Reuters

A performer takes part in an unveiling of a billboard against fracking in central London, UK, on Monday

ATTENTION EDITORS - CAPTION CORRECTION FOR LON101 TRANSMITTED ON APRIL 23, 2015 AT APPROXIMATELY 0830 GMT...ATTENTION EDITORS - CAPTION CORRECTION FOR LON101 TRANSMITTED ON APRIL 23, 2015 AT APPROXIMATELY 0830 GMT. THE CAPTION INCORRECTLY MENTIONS A PUSH CHAIR. A CORRECTED VERSION IMMEDIATELY FOLLOWS THIS ADVISORY. WE ARE SORRY FOR ANY INCONVENIENCE CAUSED. REUTERS.  A woman walks past a piece of street art depicting a pregnant Catherine, Duchess of Cambridge, in north London, April 23, 2015. The Duchess is due to give birth to her second child in the next few days.  REUTERS/Cathal McNaughton TPX IMAGES OF THE DAY  TEMPLATE OUT

Cathal McNaughton/Reuters

A woman walks past a piece of street art depicting a pregnant Catherine, Duchess of Cambridge, in north London. The Duchess is due to give birth to her second child in the next few days.