If you have a current passport and visa (or don't require one), you should be fine.
Slovakia started issuing the current biometric passports on January 15, 2008.
If you can still be identified from the photo in your current passport, you don't need to apply for a new one.
The current passports are burgundy red with the Montenegrin coat of arms.
Your current passport is the preferred form of proof.
However, you will need to bring your current passport with you when you apply.
(The application should also include a covering letter explaining why the current passport is not included.)
He had three current passports of his own, but Alipov's concern was valid.
His current passport shows he left China July 18, 2008 and returned there on August 28.
We also require one photocopy of all supporting documents including your current British passport.