Prime Minister David Cameron's official spokesman said:
The report raises legitimate concerns about the backlog of outstanding cases. We are aware of that problem. It is something we are already trying to tackle.
The report itself acknowledges that we have started to address some of these problems.
Asked whether there might be an amnesty for people in the backlog, the spokesman said: "That is not something we are considering."
More top news
Jordan Burndred's devastated mum Nicola confirmed the news on Facebook saying the 17-year-old 'didn't make it through the night.'
At least four plots attempts to smuggle highly-radioactive materials to Islamic State militants were stopped in the last five years.
Women should be warned not to drink alcohol for the whole of pregnancy to avoid harming their baby, researchers said.