VIDEO: 7/7 Anniversary - David Cameron pays tribute to victims

Remembrance services to mark the tenth anniversary of the July 7 attacks have started.

David Cameron and Boris Johnson laid wreaths at the permanent memorial to the 52 victims killed in the atrocity in Hyde Park, central London. The Prime Minister and Mayor of London paid their respects at 8.50am. At that time a decade ago, a series of explosions hit the capital's transport network. Survivors and relatives of victims are attending other services at stations in the capital.

Prime Minister David Cameron, Transport Commissioner Sir Peter Hendy and Dr Fiona Moore, Chief Executive of London Ambulance, carry wreathes at the July 7 memorial in Hyde Park, London, as Britain remembers the July 7 attacks amid a welter of warnings about the enduring and changing threat from terrorism a decade on.

Prime Minister David Cameron, Transport Commissioner Sir Peter Hendy and Dr Fiona Moore, Chief Executive of London Ambulance, carry wreathes at the July 7 memorial in Hyde Park, London, as Britain remembers the July 7 attacks amid a welter of warnings about the enduring and changing threat from terrorism a decade on.