The "Oxford problem" in my opinion, solves itself after a few weeks when a litle experience has been gained.
The "Oxford Problem" should have never been allowed to get legs in the first place. It has been going on for years under the former GFS so it's nothing new. Place the blame squarely on the company flying instructors who either deliberately encourage wide circuits to make more money or more probably fail to teach their students the correct spacing downwind required of a normal circuit pattern. Either way it is poor instructional technique which has not been addressed by CASA FOI responsible for the over-sight of the operation. CASA need to get out of the office instead of concerning themselves with just paper trail audits. Wide circuits costs money to other users of the circuit.