Please familiarise yourself with the general legal position by reading the information here. You will then need the Comprehensive Title Deeds Package to check for boundary maintenance covenants.
Title Deeds are the documents that prove legal title to a property. They consist of a Title Register and Title Plan.
Filed Deeds are the ancillary documents which are referred to in the Title Register. They may be conveyances, transfers, easements, charges, agreements, rights of way or anything else listed in the Title Register – these are referred to collectively as filed deeds. Any document noted on your Title Register as “copy filed” is a filed deed and can often be obtained within the hour.