What the longest outstanding registration of title is that the Keeper of the Registers of Scotland has.

The Land Registration (Scotland) Act 1979 imposes no set time-limits for the processing of applications for registration. The length of time that an application spends awaiting attention and undergoing processing depends largely on its complexity. As a generalisation, the more complex an application is, the more time it will take to complete registration.
Rule 9 of the Land Registration (Scotland) Rules 1980 provides for three different types of application to be made to the Land Register. Those are an application for first registration (FR), an application for registration of dealing with the whole of a registered interest in land (DW) and an application for registration of a transfer of part of a registered interest in land (TP).
FR and TP applications involve the preparation of new Land Register title sheets and title plans. They involve detailed, considerative examination of legal documents by experienced registration staff and can be complex and time-consuming. By contrast, DW applications involve relatively minor amendments to the Land Register and are generally more routine and quicker to complete. Since the norm of land registration is the attachment of a state indemnity (guarantee) to registered titles, which can mean the payment of public money to persons who suffer loss because of an error or omission in the Land Register, particularly complex cases require very careful handling by senior Land Register caseworkers. This may entail in-depth analysis of the preceding title history of property, thorough investigation of title problems, requisitioning of additional evidence from solicitors and complicated mapping procedures.
Although the Land Registration (Scotland) Act 1979 is silent as to the time limits for completion of cases, the Keeper does set annual targets for the completion of applications to the Land Register and the Sasine Register. The following table sets out the key application completion targets for 2011-2012 along with performance against the same. Some 87% of applications submitted to the property registers fall within these performance targets.
Turnaround Time Information for 2011-12
Key Performance Target
Performance for Year 2011-2012
Complete 80% of standard FR applications within 60 days and the remainder within 120 days.
99.20% completed within 60 days. Remaining 0.80% completed within 120 days.
Complete 80% of standard DW transactions within 60 days and the remainder within 120 days.
98.81% completed within 60 days. Remaining 1.19% completed within 120 days.
Complete all applications submitted through the on-line Automated Registration of Title to Land system within 24 hours.
99.99% completed within 24 hours.
Complete recording of 80% of writs presented to the Sasine Register within 20 days and the remainder within 40 days.
100% completed within 20 days.
Identical completion targets have been set by the Keeper for 2012-2013. Currently all targets are being met.
For those FR applications not covered by time bound completion targets (what are termed complex transactions) the Keeper has set a target that by the end of March 2013 no FR application will be older than six months, except for those where the Keeper cannot complete because of factors outwith her control, such as court action, or by agreement with the submitting solicitor. The target that the Keeper has set for TP applications is for no such application to be older than nine months by October 2013.
The longest outstanding application to the Land Register relates to the registration of a property in Arbroath. An application to register a Disposition giving effect to a transfer of ownership was received by the Keeper of the Registers of Scotland on 12 February 2001. Completion of the registration has been held up by court action and therefore completion of that registration is out with the control of the keeper.