Why do you persist with that nonsense lookout, had there been two calls made to police they would have been recorded as such and spoken to by witnesses at the trial.
Because there was a general cock-up of everything else,to admit to there being two phone-calls would have been the end of the trial and a few jobs to boot.
Two Mr Bambers,separate addresses ( or was it, in the minds of officers ?) which is how it would have appeared to those not expecting a call-out for a murder or an attempted one/s.
My " nonsense " is every bit as nutty as yours.