If he never renounced his citizenship (and if such citizenship existed by reason of his father's legal domicile) then he probably owes back taxes to the U.K.
And unlike trying to get a judicial hearing which requires "legal standing" and time and money and can be easily derailed on technicalities - complaints of tax evasion or avoidance (at least in the U.S.) trigger an automatic and official investigation.
It would be ironic for Chicago rooted Obama to be brought down to earth by the same technique used against Chicago rooted Capone. Capone had all the usual criminal bases covered up, but he didn't allow for the IRS.
But, of course, I do not know if England's tax collection authority is as powerful, autonomous, mindless and brutal as our own IRS.
And wouldn't it be ironic if "Chicago-rooted Obama [were] to be brought down to earth by the same technique used against Chicago-rooted Capone."
That would be entirely fitting, dearest sister in Christ!
Thank you oh so much for your fascinating insights!