Any particulars of a mortgage or charge created before 6 April 2013 must be notified on form LL MG01 (England and Wales, Northern Ireland) or form LL MG01s (Scotland), which can be found on the National Archives website.
It costs £23 to register a charge, regardless of when the charge was originally created.
Forms need to be printed at full size on white A4 sized paper.
Message added: Due to essential maintenance Companies House online services will be unavailable between Saturday 16 April 2016 and Sunday 17 April 2016. Please accept our apologies for any inconvenience this may cause. You’ll still be able to file with HMRC.