The terror attack in London, which has left seven people dead and 48 injured, is the second atrocity to rock the UK in as many weeks.
It comes after the bombing at an Ariana Grande concert in Manchester which killed 22 people in the worst terror attack in Britain for a decade.
And just a few months earlier, the capital fell victim to a similar terror attack to that which happened in London Bridge, when Khalid Masood launched a car and knife attack over Westminster Bridge, killing five people.
Here is a timeline of recent terror attacks in the UK:-
:: May 22 2017: Twenty-two people – including children – are killed and around 59 injured during a suspected terrorist bombing at a pop concert in Manchester.
Lone suicide bomber Salman Abedi detonated an improvised explosive device as crowds of music fans, many of them youngsters, left Manchester Arena following a performance by US artist Ariana Grande.
:: March 22 2017: Five people were killed when Islamist extremist drove a hire car over Westminster Bridge, mounted the pavement and hit pedestrians before crashing into railings outside the Palace of Westminster.
He stabbed Pc Keith Palmer, 48, to death and also killed US tourist Kurt Cochran, Romanian tourist Andreea Cristea, 31, and Britons Aysha Frade, 44, and 75-year-old Leslie Rhodes. Masood was shot dead by police.
:: June 16 2016: Labour MP Jo Cox was shot and stabbed multiple times by right-wing extremist Thomas Mair outside her constituency office in Batley, West Yorkshire. He was later handed a whole-life prison sentence for her murder.
:: December 5 2015: Somali-born Muhiddin Mire went on a rampage in the ticket hall of Leytonstone Underground station in east London, targeting strangers at random before slashing fellow passenger Lyle Zimmerman, 56, with a knife.
The schizophrenic was sent to Broadmoor Hospital after being given a life sentence with a minimum term of eight years for attempted murder.
:: May 22 2013: Fusilier Lee Rigby was walking near his barracks in Woolwich, south-east London, when the 25-year-old was rammed with a car by Islamic extremists Michael Adebolajo and Michael Adebowale, who then tried to hack off his head with knives. They were jailed for life at the Old Bailey in February 2014.
:: June 30 2007: Two men inspired by Islamist extremism rammed a 4×4 laden with petrol and propane tanks into the main terminal of Glasgow Airport. One died in the incident, which left five people injured.
:: July 7 2005: Four suicide bombers killed 52 and injured hundreds of others in blasts on the London Underground network and a bus. Twenty-six died in the bombing at Russell Square on the Piccadilly line, six in the bombing at Edgware Road on the Circle line, seven in the bombing at Aldgate on the Circle line, and 13 in the bombing on a bus at Tavistock Square.