Next Left suggests this has long been the position of most of the LibDem frontbench, but notes that they may have "difficulties convincing their party that AV is a step in the right direction if the holy grail of STV can not be gained".
Peter Hain was running late for the event, but he had a good opening line.
"I am sorry for being late. But before I came here, I thought I had better go and give a speech on electoral reform."
This generated a hearty cheer from Lamb on the platform, as well as applause and laughter from much (if not all) of the audience.
To which Hain said:
"But wait until you hear what it was. I am for the Alternative Vote - and not for proportional representation."
To which Lamb shouted: "We'll take that. We'll take that" from the platform.
Watch this space.