Jason Dorsett, finance director at Monitor says: "It's a tough financial climate for the NHS at the moment. The government has put more money into the NHS but the population is getting larger, people are getting older so that money has got to go further every year.
"So what we're finding is not that foundation trusts are in great difficulties, but there are closer to the margin, they've got less surplus to go around."
More top news
Tom Hiddleston can count the royals among his legions of fans - as the Duchess of Cornwall revealed they were "gripped" by The Night Manager
MPs say the results show that Jeremy Corbyn's brand of socialism isn't working - but he has done well enough to stave off a coup.
Journalists hoping to see a once-in-a-generation 'coronation' of leader Kim Jong Un were instead taken on a factory tour.