- Updates on Wednesday 31 August 2016
Updates for London have now ended for the day but we'll be back at 08:00 on Thursday with the latest videos, news, sport, travel and weather.
For further updates on the police chase which saw a woman and boy die earlier in Penge, south-east London, keep checking BBC News.
A spokesman for the Independent Police Complaints Commission has confirmed the events surrounding the deaths in Penge are now the subject of an independent investigation and it has deployed investigators to both the scene and the post-incident procedure at a local police station.
The IPCC has asked that any witnesses should contact the IPCC if they saw the accident or anything leading up to it:Call the IPCC on 0800 096 9070 or email firstname.lastname@example.org
Home affairs correspondent, BBC LondonCopyright: PA
The majority of police pursuits in London take place at relatively low-speed and end quickly when the driver pulls over.
But there's been concern about a recent rise in the number of people killed in car chases.
The police watchdog, the Independent Police Complaints Commission (IPCC), says there were 13 deaths in the UK in 2015/16 - during or after police chases - up from six the previous year.
In London in 2015/16 there were three deaths, up from one the previous year.
The Metropolitan Police philosophy is no pursuit is worth risking the safety of the public and that travelling through built-up areas at more than 40/50 mph is simply not worth it.
Also, the amount of CCTV on the streets of the capital, tracing vehicles - after the event - is easier than ever before.
However, watching a suspect get away is clearly galling for officers, and a great worry if the suspect poses an immediate threat.
Sources say it's become increasingly common for a senior officer - monitoring events in real-time in the police control room - to call off a chase if they feel the risk to the public has become too great.
Often, the control room will try to scramble the most highly-trained pursuit officers to take over.
They are in the minority though, and the body which represents rank and file officers, the Police Federation, has said a reduction in specific road policing officers nationally has led criminals to thinks they can get away.
With fewer specialists on the roads, more chases will be allocated to officers who don't have the daily experience of high-speed pursuits.
The details of what happened today in Penge are still not clear. The investigation is now in the hands of the IPCC.
But this crash shows once again how devastating the consequences of police chases can be.
Ilya Baxter, 23, saw the police chase in Penge from a window in his flat.
He described seeing a white man aged between 18 and 25 running across the road around the corner from the crashed car, before police caught him.
He said: "I heard the cars and saw someone pointing to the police where he went.
"I knocked on the window and pointed."
He said the man was hiding in the bushes. Police then caught the man, handcuffed him, and then went to help the injured, he added.
An eye-witness describes her account of the crash in Penge which has left two dead.
BBC Home Affairs Correspondent
Over the last 10 years, 252 members of the public have died following road traffic incidents involving the police in England and Wales, according to the Independent Police Complaints Commission.
The number has been broadly on the decline, though in the most recent 12-monthly period, to the end of March, there were 21 deaths - the highest total for three years.
Of the 252 deaths since 2006-07, 159 were what the IPCC describes as "pursuit related", 13 of which occurred during 2015-16.
In 2007, the IPCC published a review of police road collisions and made 29 recommendations to improve safety and reduce crashes.
In 2011, the Home Office issued an updated code of practice for police on the way they manage and deal with pursuits.
- Copyright: PA
A signal failure at Lewisham caused delays on commuter services on the Southeastern rail franchise.
A second problem with the points on the track just outside Charring Cross station also disrupted services.
Network Rail said delays would continue into the afternoon but that both issues had been fixed.
- Copyright: PA
A London Ambulance Service spokesperson said: "We were called at 14:05 to reports of a road traffic collision at Lennard Road SE20.
"We sent multiple resources to the scene including three ambulance crews, two incident response officers, an advanced paramedic and London's Air Ambulance.
"Sadly, a woman and a boy died at the scene.
"We treated a further three patients, all girls, at the scene for multiple injuries and they were all taken to hospital."
Venissa Vassell, 18, heard sirens and a car screeching as she walked from the train station and immediately ran to help.
She said there were twin girls aged around seven trapped under the car and 20 people came to lift the car up to free them.
The girls "crawled out", she said, but another girl, aged around 11, who was later taken away by ambulance, was screaming 'I can't feel my legs'.
Another woman, believed to be in her late 30s or early 40s, and 10-year-old boy she was was related to, were killed, Ms Vassell said.
She said: "I did CPR on this lady. I blew in her mouth. It wasn't working. Her body was trying to revive."
She said the accident "all happened too quick" and she "could not explain" what she saw.
This is the scene at Penge this afternoon after two bystanders were killed following a police car chase.
The car was being chased because it had been reported stolen.
The witness said that a black car was being chased by two police BMWs when the driver lost control as he turned into Lennard Road in Penge.
"He lost control and ploughed into a family that was walking on the pavement down Lennard Road.
"People were trying to lift a car off a little girl. The police officers that were chasing were distraught."
Another eyewitness, who also did not want to be named, said that apart from the two people who died, he saw two casualties who were children being taken away by ambulance.
- Copyright: Shulem Stern
Two people have died after they were hit by a car being chased by police.
Witnesses described the scene in the aftermath of the smash this afternoon in Penge, south-east London, which saw the pursued car plough into pedestrians.
One man, who lives near the scene, said: "It was a horrific scene on a sunny afternoon in a sleepy place."
A Met Police statement says: "At approximately 14:05 a car was in collision with a number of members of the public in Leonard Road, SE20.
"The car was being pursued by police at the time of the collision. London Ambulance Service and London's Air Ambulance attended - two people have been pronounced dead at the scene.
"We await updates regarding any other injuries.
"The driver of the car has been arrested and remains in custody at a south London police station.
"The Directorate of Professional Standards has been informed. The Independent Police Complaints Commission has been informed."
Two people have died in a road traffic accident in Penge, south east London, after they were hit by a car being chased by police, Scotland Yard said.
BBC London Travel
BBC Radio London Travel
Billy Reeves says there are delays and a road is blocked due to a serious accident on A213 Parish Lane in both directions around Penge Lane in south east London.
It's not far from Penge East train station. There is a diversion affecting the 75 and 194 bus routes.
- Copyright: Met Police
A survey of 26,000 people, carried out for HM Inspector of Constabulary, found 36% had not seen a police officer on patrol over a period of 12 months.
Another 23% said they had seen police on foot only once or twice over a year.
The public perception of police was "vitally important" in having the confidence to report crime, HM Inspector Mike Cunningham said.