I think it was me that mentioned it and the idea was never for it to get to a point where we were using it to co-ordinate overtakes as in my opinion it's completely stupid.
Just for keeping tabs in case anyone got caught at lights or there was a breakdown, or to warn of scamera vans, dangerous conditions ahead etc.
Obviously the Santa Cruise was a low speed affair, but it showed that it is quite straight forward to get split up, or even to get it wrong (guys going to wrong Asda).
I've got 4 Cobra two ways here that I got in America and they have good range. Don't mind sharing them out amongst people on a run, even if it is just for group leaders