The following is an extract from those pages.
For minimum compliance, you should broadcast your intentions: before or during taxiing
immediately before entering a runway, whether active or not
inbound 10nm or earlier from the aerodrome immediately before joining the circuit
on a straight-in approach, on final, by 3nm from the threshold
on a base-join approach, before joining on base
when flying near, but not intending to land at, a non-towered aerodrome, where the pilot intends to fly through the vicinity but not land.
But use your radio more often if needed.
So what they are saying is anyone already established in the circuit isn’t actually obliged to make any calls at all!
Last edited by CANCEL SARTIME; 28th July 2012 at 03:28.