Two people are being questioned about the kidnapping of a British photographer in Syria.
The man and woman were arrested at Heathrow Airport. Scotland Yard is investigating whether one of those arrested is an NHS doctor.
Ronke Phillips discussed the latest developments with Nina Hossain.
More top news
An investigation has begun after a teenager was stabbed in south London.
A dramatic blaze which tore through a building site in London's West End, prompting fears of an explosion, has been brought under control.
Childhood pursuits such as climbing trees or flying kites in public parks could soon attract hefty fines in one London borough.