There are plenty of 'new' tracks running F2s (both BriSCA and Outlaw / Independent tracks) and most of them could hold F1 meetings. Whether they would want to or not is another matter.
This closed shop mentality from BriSCA / the BSCDA / whatever, needs to stop or it will kill the sport. Tracks are closing fast, but new tracks cannot join BriSCA even if they wanted to, as it will 'dilute the sport' whatever that means?! Your rather patronising reply Beaks suggests you don't feel that any existing non-F1 tracks are suitable to join the BriSCA 'club' and that they are happy with things as they are.
What would people rather have in 10 years time? 4 tracks each running half a dozen meetings a year, or 12 tracks each running at least one meeting a year?
In case anyone wants me to actually name some (and this is without debating the suitability of field tracks such as Smallfield):
Well there it is then for anyone kidding themselves there was ever going to be a 'new Coventry.' They have business interests to protect!
There are plenty of tracks that could be raced on across England/Scotland if the sport is actually interested in trying to survive. There needs to be less snobbery and thinking tracks should change to suit F1. F1 needs to change to suit the tracks that are left.