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Two women have been arrested for trying to travel to Syria to join a proscribed organisation.
The pair, aged 16 and 20, were arrested in central London on Sunday evening on suspicion of preparation of terrorist acts.
Officers from the Met Police Counter Terrorism Command arrested a 20-year-old woman and a 16-year-old girl on suspicion of preparation of terrorist acts, namely travelling to Syria to join a proscribed organisation.
They were arrested in central London at approximately 9pm on Sunday, August 21. Both were taken into custody at a central London police station.
A man has been arrested at Heathrow Airport on suspicion of terrorism offences.
The 29-year-old was arrested as he was about to board a flight to Saudi Arabia.
The man is being held by officers from Scotland Yard's Counter-Terrorism Command on suspicion of possessing information of a kind likely to be useful to a person committing or preparing an act of terrorism.
A west London home is being searched and Scotland Yard said several electronic devices have been seized for analysis.
The man is being questioned at a police station in London.
A doctor and two nurses have been charged with the manslaughter of an Irish woman who had an abortion in London.
Dr Adedayo Adedeji, 62, Gemma Pullen, 31, and Margaret Miller, 54, will appear at Ealing Magistrates' Court in west London on June 19.
All three have been charged with "manslaughter by gross negligence and failing to take reasonable care of other persons who may be affected by acts or omissions at work", Scotland Yard announced.
The 32-year-old woman from Ireland had an abortion at a clinic in Ealing, west London, in January 2012.
The senior national coordinator for Counter Terrorism Policing has said that 'several attack were plots disrupted' last year amid a slew of arrests.
Last year's arrest figures demonstrate a considerable increase in volume, range and pace of counter-terrorism activity in the UK.
We have been running exceptionally high numbers of investigations, the likes of which we have not seen for many years.
Several attack plots have been disrupted, of various sophistication; from individuals planning to carry out lone attacks to more complex conspiracies, the majority seemingly directed by or inspired by terrorism overseas.
The partnership between police and MI5 is very effective, and we are experiencing very strong support from the communities.
Scotland Yard has said total of 165 arrests were made by police officers across the country for suspected Syria-related terror offences in 2014, compared to 25 in 2013.
Officers said that offences included terrorist financing, commission, preparation or instigation of acts of terrorism and attending a terrorist training camp.
Of the 165 arrested, 64 have so far been charged and are appearing before courts up and down the country.
The number of arrests for terrorist offences were 327 in 2014, a 32% increase compared to the previous year.
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Scotland Yard ignored recommendations to review a controversial "hard stop" police tactic that was employed against Mark Duggan when he was shot in 2011, sparking rioting across the country, it has emerged.
The Metropolitan Police had been advised to review its use of the "high risk option" in 2005 by the Independent Police Complaints Commission (IPCC), the BBC's Panorama programme has found.
The pre-planned "hard stop" tactic sees armed officers deliberately intercept a vehicle to confront suspects.
Scotland Yard has conceded it was wrong not to have reviewed the tactic at the time, but said an "interim review" had now been completed by the College of Policing.
An actress who was bitten by a police dog after a burglary has received an apology from Scotland Yard.
Juliet Aubrey, 47, was mauled by an Alsatian when she called officers as burglars raided her London home in March 2012.
The dog handler will face misconduct proceedings over the incident.
A Scotland Yard spokesman said: "The MPS has acknowledged that the woman was let down when she called the police for help on 13 March 2012 and has offered her a formal and sincere apology. It would be inappropriate to comment further at this time, pending the outcome of the case."
Aubrey's films include Gloria Woodrow in the Constant Gardener, and she has appeared in a number of TV series such as The White Queen and Silent Witness.
The Metropolitan police will be putting high visibility patrols in crowded places across the capital to raise awareness of the threats Londoners face from terrorists.
Codenamed Operation Penna, it will see specialist officers brief members of the public, businesses and local police to improve protection from terrorist attacks and run until 24 January.
Commander Richard Morris, from Specialist Operations, said: "Everyone has a role to play in keeping London safe from terrorism.
"This operation sees specialist officers working closely with neighbourhood officers and communities raising awareness of security in London.
"We want to build on our engagement with communities and businesses in a variety of ways to counter the threat from terrorism. Our aim is to raise awareness and improve protection from a terrorist attack and other crimes."