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
The treatment uses cancer-killing immune cells taken from donor blood, which are multiplied in the lab.
The Argentine navy announced that a sound thought to be an explosion had been detected by US and specialist agencies leading the search.
Earlier this month the Kill Bill star said she was too angry to share her thoughts on the allegations swirling around Hollywood.