A 20-year-old British man has been arrested at Heathrow airport on suspicion of assisting terrorism in Syria.
The Briton is the second man to be arrested at the busy airport on suspicion of terror offences today.
Earlier, a 19 year-old was held on suspicion of preparing for acts of terrorism in what police described as a "Syria-related" incident.
Police said the two arrests are not connected. Both men remain in custody in London.
More top news
The Labour Party has defended the sale of a mug bearing the words "controls on immigration" after it was mocked online.
We spring forward an hour at 1am on Sunday, to mark the start of British Summer Time.
Top Gear co-host James May takes up recorder and posts musical videos online as he fills his time during his 'unemployment'.