Also it was held in Cheltenham because it was convenient for John, Allen, Fozza and Chris. You can't have a LaveCon without all 4 and I can't imagine they would be too enamored to head a long way from their locale to organise an event.
I'm going to disagree here ... and if any of the Lave Radio guys want to comment on on this, please do.
Lavecon is named after the fictional planet Lave, not Lave Radio, which itself is named after the fictional planet Lave. So for it to be called Lavecon is, forgive me for being blunt here, nothing to do with the Lave Radio guys other than the fact they called their podcats Lave Radio and naturally they called the event Lavecon.
There is no reason why a gathering of Elite fans can't be called Lavecon. It fits with other convention names ie ComicCon, BlizzCon etc. And you will have to accept that sooner or later, there will be a gathering where at least one of the Lave Radio guys doesn't attend. To insist that only gatherings all four Lave Radio guys attend be allowed to be called Lavecon is neither fair to anyone organising it or to the Lave Radio guys themselves.
Here's a hypothetical situation ... what if the Lave Radio guys are organising a gathering, and call it Lavecon, then one of them says "I can't make it" ... do they have to stop using the name Lavecon because only three out of the four guys will be there?