Police and emergency servies telephone calls (Thea)

Looking at emergency service calls on the internet a lot of the ones that are on youtube are unfortunately hoax calls or joke ones. However the greater remains the same. As you can see below, the operator answers the phone with; "Greater Manchester Police, How can I help?" Currently, in our opening, the operator says Hello, emergency services how can I help, although this is very similar. Perhaps our operator may need to say, they are the police as the call would probably have been directed to either 'Police, Ambulance or Fire' before being asked to give details of the incident so that their call could be advised clearer. We may need to re-record the telephone call depending on how much this authenticity will affect our opening.