I agree with Hegemon88 substantially.
Hearing the correct calls o/hd, cross-wind, downwind & finals is what should be done. Even here for Sywell a downwind call would help one hear, as well as (possibly) see the other chaps.
Why Sywell can unilaterally (& with CAA blessing as it's the same as the LAA Rally nonsense) decide to ditch correct RT is a mystery. Obviously cluttered RT should be avoided but as it stands now we are all condemned to extra danger of Air to Air collision, because of their fear of a few numpties on the RT who could easily be advised by ATC to 'cut it'.
Add to that, an any speed, any height, any diameter 'circuit' over Pitsford and we have double trouble.
mike hallam.