Prime Minister David Cameron led sombre tributes on Tuesday as Britain commemorated the 10th anniversary of attacks that killed 56 people in London, the first suicide bombings by Islamist militants in western Europe.
Relatives of the victims, survivors, and senior politicians gathered to remember those killed in the July 7 2005 bombings with emotions still raw after a massacre in Tunisia last month, Britain's worst loss of life in a militant assault since London.
"Today the country comes together to remember the victims of one of the deadliest terrorist atrocities on mainland Britain," Cameron said in a statement.
"Ten years on from the 7/7 London attacks, the threat from terrorism continues to be as real as it is deadly – the murder of 30 innocent Britons whilst holidaying in Tunisia is a brutal reminder of that fact. But we will never be cowed by terrorism."
In the early hours of July 7 a decade ago, four young British Muslims travelled down to London where they detonated homemade bombs hidden in rucksacks on three underground trains and a bus during the morning rush-hour.