Sometimes ATC can get into the act and help you out, if they feel like it.
Recently, one of my colleagues was in the training circuit at Bankstown, following a cessna which was atleast 2 miles out on mid downwind.
Tower :"ABC confirm you're following the cessna" to which his response was a simple "negative!"
A few change of sequence instructions followed soon after.
All following circuits were normal - by all aircraft.
[This message has been edited by Pub 45 (edited 09 December 1999).]