Events will be held accross the capital today to commemorative 70 years after the liberation of Auschwitz-Birkenau in Poand.
Senior politicians and other dignitaries will join survivors for an event at Westminster with another event taking place the Imperial War Museum.
The victim, named online as political activist Christina Annesley, died yesterday on Koh Tao, an area popular with tourists and backpackers.Read the full story ›
Prime Minister David Cameron pressed US President Obama to release Shaker Aamer, the South Londoner held in Guantanamo Bay.
National Security Council spokeswoman Bernadette Meehan said Obama said he would "prioritise" the case of the last British person held in the notorious prison.
Prime Minister Cameron raised this case with the president, and the president told him that he understands why this case is of great interest to the Prime Minister and the British people. "The president committed to the Prime Minister that we will prioritise this case, while making sure any action taken is consistent with our national security.
A British government source welcomed the commitment as a "step forward".
We see this as a step forward. We now need to keep working with the Americans and continue our discussions to resolve this case once and for all.
A group of senior doctors has called for a London man held in Guantanamo Bay to be released, warning of his "fragile medical condition".
Medics said that Shaker Aamer was suffering from conditions including post-traumatic stress disorder and asthma and his continued detention was having an "appalling effect" on his health and that of his family.
Prime Minister David Cameron is expected to again raise Mr Aamer's case with President Barack Obama during his visit to Washington this week.
Mr Aamer, who is originally from Saudi Arabia but moved to Battersea, London, and has a wife and four children there, has been incarcerated at the controversial US detention centre since 2002.
In a letter to a national newspaper, the health experts, including consultants and professors, said Mr Aamer had "pressing medical concerns".
The signatories include three members of the Foreign Office pro bono medical panel, which can assist with advice for Britons held overseas but which the doctors said had so far not been allowed to help Mr Aamer.
The letter was organised by David Nicholl, a consultant neurologist, human rights activist and member of the council of the Royal College of Physicians, and is signed by physicians, including professors of neurology and public health, consultants and GPs.
Landmarks across London have lit up in the colours of the French flag in a tribute to the victims of last week's terror attacks.
Downing Street said the Union flag at Number 10 was lowered to half-mast at the start of the rally "as a mark of solidarity and respect".
Hundreds of people are at a rally in Trafalgar Square in honour of the victims of last week's terror attacks in Paris.
Deputy Prime Minister Nick Clegg has joined the crowds and London Mayor Boris Johnson is expected to attend soon.
Crowds of people, many holding banners reading 'Je Suis Charlie,' gathered in Trafalgar Square this afternoon in support of the victims of last week's terror attacks in Paris.
London landmarks, including Trafalgar Square, will be lit up in the colours of the French flag later today, in a show of unity with the citizens of Paris.
As it was announced that London landmarks would be lit up today in tribute to the Paris terror attack victims, Boris Johnson said it was important that Londoners demonstrate "solidarity" with the French capital.
Londoners have been appalled by the distressing scenes in France this week and it is important that we pay tribute to the victims of these attacks, as well as demonstrate our solidarity with the people of Paris.
We should not forget the hundreds of thousands of French citizens who call London their home. Our thoughts will be with them this weekend as they do their best to deal with the agonising scenes we have witnessed.
Joining together in opposition to the ideology of hatred sends the clearest possible message - one of freedom of expression and one of resolve. Nous sommes Charlie.