Quite clear that it isn't regionalised (All seven clubs will field their own four-man team, who will race their opponents over six heats on a one-home, one-away basis after Premiership matches between the respective sides.) but as the Premiership isn't exactly a nationwide competition like the Championship, the travel isn't too big a burden.
Six home meetings can be accomodated in the warmer, lighter summer nights when spectators are happier to stay on to watch the juniors. As long as the promoters all take it seriously, use their own junior riders and encourage spectarors to stay and watch, it can succeed.
All it needs to be a success is for one gilt-edged UK prospect to emerge from this mini-league every year, and that's job done.