It is my understanding that the press code forbids people being named in these circumstances. There is currently a private member's bill going through Parliament that, if passed, will forbid people of interest or helping with enquiries being named unless permission is given by a Crown or higher judge.
Such reckless behaviour by the press (several outlets named them) fortunately have had no nasty repercussions, so far, from the public taking the law into their own hands.
I hope the couple involved make a complaint on this to the Press Complaints Commission & it results in more than an apology, on page 15, in the small print.
As for the police, like all large organisations they will have issues at times on security, officers following the rules or rogue officers having their own agendas. So I will reserve judgement on this, beyond my "possibly", until any internal investigation has been made public.