I’ve had 2 close calls in 2 years, both from pilots who had got the live side of the circuit wrong.
Last year, in the circuit, I’d just called downwind, and found a Piper climbing dead ahead towards me having done a PFL on the live side against the circuit direction.
Saturday just gone, I had turned down wind, and found another Piper descending left-to-right in my 10 o’clock across my path, but called “Descending deadside”. They then processed to descend to circuit height over the “Do not overfly” village inside the circuit.