Sign up now! Sign up now! Sign up now? Sign up now! Before an engorged international break we have a gala weekend of derby games. Some of them are familiar, others rather longer in the waiting, others spurious in their definition but shoehorned in for tea-timely email purposes. Thursday night’s Bigger Vase defeat by Ferencvaros was not a great result for angry Martin O’Neill’s Celtic, coming three days before the Old Firm/Glasgow derby (delete as applicable according to adherence to Scottish co…