BBC London Live: As it happened

On BBC London tonight live at 18:30 on BBC One, Sadiq Khan has insisted he will force developers to make 50% of new builds affordable - but he's coming under growing pressure to clarify his other election pledges on housing.

Also more on the story that detectives are investigating the murder of a woman, named locally as mother of four Saima Khan, 34, who was stabbed to death at her home in Luton.

And plans for a new International Centre for Film and TV on the Southbank have been revealed today.

It will be mainly dry overnight with clear spells leading to a chilly night, especially across southern parts with some mist and fog patches likely to form by dawn.

The odd patch of light drizzle is possible in the cloudier northern parts though such as over The Chilterns. 

The minimum temperature will be 8C (46F)

Seven men and two women have been arrested in a major operation to crack down on drug dealing in Thamesmead.

Acting on concerns raised by the community, officers carried out a series of dawn raids, with warrants executed at 11 addresses in Thamesmead and one address in Ealing.

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Around a kilo of class A drugs, two large carrier bags of cannabis, a variety of weapons and more than £30,000 cash has been recovered so far.  

The suspects, aged between 18 and 56, were arrested on suspicion of a range of offences, predominantly the supply of class A and class B drugs. They remain in custody at a south London police station.

London's Donmar Warehouse is to open a temporary theatre in King's Cross to host the company's all-female Shakespeare trilogy.

Phyllida Lloyd will direct revivals of Julius Caesar and Henry IV and a new production of The Tempest, which are all set in a women's prison.

Holly WrenCopyright: Holly Wren

Harriet Walter will play Brutus in Julius Caesar, King Henry in Henry IV, and Prospero in The Tempest.

The new in-the-round venue will be open for 13 weeks from 23 September.

A 76-year-old cyclist is in a critical condition in hospital after a collision with a van in Ealing.

Police were called at 10:00 on Wednesday to reports of a collision at the junction of Northfield Avenue and Salisbury Road.

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Officers, London Ambulance Service and London's Air Ambulance attended the scene.

The male driver of the van stopped at the scene and is currently helping detectives with their enquiries. He was not arrested but is being interviewed under caution.

Detectives are appealing for anyone who may have witnessed the collision which is believed have occurred at around 09:45.

Train conductors have called in sick more than 1,000 times in a month, according to a rail operator they are in dispute with. 

An average of 83 services are being cancelled every day due to sickness of conductors, Southern said, as it published figures which show its conductors called in sick 1,066 times in the last 32 working days. 

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According to Southern the rate of absence has almost doubled since the first conductors' strike on April 26. 

Its data shows that in the two weeks prior to the first strike there was an average of 23 conductors off sick each day - but since the strike that number has risen to 40, and increased to 45 in the last 10 days. 

 A spokesman for Southern said: "We would not usually release such information, but passengers deserve to know the reasons behind the unusually high level of train cancellations they are presently experiencing."

Armed police patrols will target gun crime hotspots across the capital after a rise in the number of shootings. 

Scotland Yard chiefs believe there are more guns on the streets and this has fuelled a "significant" rise in the number of shootings in the past three months. 

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There were 226 last year, and so far this year there have been 122, with a particular rise since March. 

Nationally, there has been an increase of around 19% since 2013/14. Six boroughs - Newham, Hackney, Haringey, Brent, Lambeth and Southwark - have been highlighted as shooting hotspots. 

 Operation Viper, involving 50 officers, will crack down on gun crime in these areas, including with marksmen accompanying officers on traffic stops. The Viper squads will also carry out weapons sweeps and targeted raids.

Scotland Yard has launched a major operation against gun crime in response to an increase in the number of shootings. 

A team of 50 dedicated officers, including armed police, will be carrying out intelligence-led patrols in London. 

The picture (below) shows some of the illegal weapons recovered by the Met Police in the last 12 months.

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There will also be more weapons sweeps and use of number plate cameras in areas linked to gun crime. 

Rewards of £2000 are on offer for people who direct police to an illegal firearm and a case resulting in a successful prosecution. 

Sir Bernard Hogan-Howe said it appeared there had been a "worrying" increase in the supply of guns. "We need to refocus our efforts on the supply side," he said.

The first detailed images of plans for the transformation of the notorious Elephant and Castle shopping centre have been unveiled.  

Presenter Julia Bradbury spent the night camping on the summit of Up at The O2 to complete her Duke of Edinburgh's Award Diamond Challenge. 

Julia camped out on top of the arena in east London to celebrate the Duke of Edinburgh's Awards Diamond Anniversary, and the Camping and Caravanning Club's National Week. 

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Trading Standards has seized close to 2,000 counterfeit cigarettes buried beneath a shop in Kensington and Chelsea.

There are delays of up to 15 minutes on Southern trains between East Croydon and Gatwick Airport due to passenger illness at Gatwick Airport. Tickets are being accepted on Thameslink services between Brighton and London Bridge.

There are delays of up to 10 minutes on Great Northern southbound between Haringey and Finsbury Park due to a signalling problem. 

There are delays of up to 10 minutes on C2C between Fenchurch Street and Grays due to an object being caught on the overhead electric wires between Purfleet and Rainham.  

There are reduced service on Southern between Victoria and Brighton, between Brighton and Ashford International, between Milton Keynes Central and Clapham Junction and between Southampton Central and Brighton due to a shortage of train drivers and conductors due to sickness.

Four people have been taken to hospital after a marked police car was involved in a crash in Albert Square, junction with Clapham Road in Stockwell, south London.

The collision with another car happened at 11:49 when the police car was on the way to an emergency call.

@chef_haswellCopyright: @chef_haswell

Two police officers and two members of the public - believed occupants of the other car - were injured. London Ambulance Service attended the scene - all four people were taken to hospital for treatment to minor injuries.  

On the M25 one lane is closed on the exit slip road and there is heavy traffic clockwise at J29, A127 (Romford), because of a broken down lorry.  

Two lanes are closed and there is queuing traffic and long delays on the A406 North Circular Road eastbound in Wembley between Harrow Road Underpass and Ikea, because of an earlier lorry fire and resurfacing work. Congestion stretches to Hanger Lane Gyratory.  

The B278 Wrythe Lane in Rosehill is partially blocked in both directions between the Robertsbridge Road junction and Rose Hill Roundabout because of an accident.

Maybank Road in Woodford is blocked between the Latchett Road junction and the A113 Chigwell Road junction because of an accident. A diversion is in operation for bus route W14. 

Sadiq Khan must deliver on building a pedestrian and cycle bridge between Rotherhithe to Canary Wharf and extending the cycle hire scheme out to Rotherhithe, Liberal Democrat London Assembly Member Caroline Pidgeon.

At Mayor's Question Time earlier she highlighted the immense transport need for a pedestrian and cycle bridge as demonstrated by the frequent overcrowding on the Jubilee Line created by commuters needing to cross the Thames.

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She also highlighted how Bermondsey and Rotherhithe are excluded from the cycle hire scheme.

Responding the Mayor described the proposed pedestrian bridge as a "great project" and in relation to extending the cycle hire scheme stated: “I don’t see any reason why we shouldn’t.”

Ms Pidgeon responded: “The case for the bridge is overwhelming. The Mayor must now come forward with concrete plans to ensure that this idea is turned into reality as quickly as possible."

Arsenal have signed Switzerland midfielder Granit Xhaka from Borussia Monchengladbach.

The 23-year-old, who has won 41 international caps and captained the German club, joins for a reported £35m on a long-term contract.

"I'm very proud to be joining Arsenal," said Xhaka. "I cannot wait to move to London, represent this special club and play in the Premier League.

"I will give everything to help Arsenal win trophies and make the fans happy."

Two fire engines and around 10 firefighters dealt with a garden fire on Goshawk Gardens in Hayes yesterday afternoon.

Brian DuffyCopyright: Brian Duffy

London Fire Brigade received numerous calls to the fire. The blaze damaged part of a garage and completely damaged a wooden shed. There were no injuries.

The brigade was called at 1820 and the fire was under control by 1901. Fire crews from Hillingdon fire station attended the scene. 

@Sophiaso1235Copyright: @Sophiaso1235

The gothic story of Jekyll & Hyde has been choreographed by Olivier Award winning Drew McOnie.

Set in the 1950s, it's the first time dance has been staged at the Old Vic in more than a decade.

Berkeley GroupCopyright: Berkeley Group

The former Labour deputy prime minister John Prescott has attacked the buy-up of almost two-thirds of the UK’s tallest residential building by foreign investors as deplorable, according to the Guardian newspaper.

It reports Lord Prescott was joined by a senior Conservative, London’s mayoral leadership and Labour’s front bench in voicing serious concerns about the Tower, after the Guardian revealed the 50-storey block of 214 luxury apartments by the river Thames at Vauxhall was more than 60% owned by foreign buyers.

Deputy Mayor of London for Housing, James Murray, told BBC Radio London: “This is another example of where the previous Mayor failed to get to grips with London’s housing crisis. 

"Sadiq Khan was elected on a mandate that Londoners should have ‘first dibs’ on more of the homes built in the capital. We will work closely with our partners to build more new homes for Londoners.”