We don't know of course? Perhaps if they had heard shots they would have gone in? As I said I believe they are trained to wait.
You have to look at this case through a 1985 lens, not a 2014 lens. In 1985 a police officer was expected to deal with a situation (on his own in many cases). Hanging back and waiting was not what we were trained to do and was not the culture or custom and practice.
Bews should have entered the premises unless he had solid evidence that his life was in danger and if the police are to be believed there was no evidence.
Overtime was severely rationed. He should have found out why the light was on in the downstairs kitchen. If the family were sat round the table having a cuppa and Bews had caused the Tactical Firearms Group to assemble he would have not just been a laughing stock, he would have been on the carpet for a severe bollocking.
It is disgusting that Bews abandoned people to their fate; people who could have been rescued. Unless of course Bews had some other information that has never been disclosed.