For the past couple of years a ranking of teams on the UK & Irish circuit has been in development on the Britishdebate list. This now seems to have received formal acceptance and has moved onto the britishdebate website.
It's not really a ranking of the UK & Irish circuit as the results from Worlds are included so several teams are in the list even though they never took part on the circuit. In addition many of the colleges who take part in weekly IVs aren't acknowledged in the rankings as they haven't performed well enough to be considered important enough to be ranked. Also the organisers of the list often have difficulty getting all the IV tabs. This is currently being discussed on the mailing list so I'm sure some agreement will be reached.
However it's an interesting view of which teams are doing well in UK & Ireland and hopefully it will evolve over time to give fair credit to the smaller teams. I know when I first put a Worlds Ranking on my site it went through 5 or 6 versions as I had considerable feedback from the smaller teams that the only fair way to acknowledge teams was on the points they earn before the break. In this way the more successful teams still move to the top and don't get an unfair boost from rounds that the smaller teams can't take part in.