Shadow Foreign Secretary Douglas Alexander said:
On the same day that top British business leaders fired a warning shot across the bows of the Prime Minister, a senior White House official has also signalled concerns about the possibility of Britain leaving the EU.
There is today a real risk of Britain sleepwalking towards exit because of a Prime Minister motivated more by the need for party unity than by the interests of the country.
More top news
We would be very keen to hear from anyone who has served on a jury and has had or is concerned about the impact it had on them.
Snapchat's stock market value sank by almost £1bn after the reality star tweeted she had stopped using the app.
Donald Trump has repeated calls to arm staff at American schools, saying a teacher "would have shot the hell out of" the Florida gunman.