The word 'explanatory' should be right here

Il sistema catastale inglese è ben differente da quello italiano
Nel Land Registry si trovano due documenti che identificato una precisa unità immobiliare:
il Title register: contains a description of the property, its tenure, name and address of the current owners, purchase price (if bought after April 2000), name & address of mortgagee and details of other charges, covenants, easements, cautions, notices and restrictions.
Il title plan: shows a detailed outline of the property in relation to its surroundings, and often (especially with larger properties) has detailed and coloured markings referred to in the Title Register that illustrate rights of way, rights of access, watercourses (not drainage) and sections of land affected by easements and covenants. The general boundaries of the property itself are edged in red.

The index map in the UK is based on Ordnance Military) Survey plans. 'Cadastral' is really a land survey vs. land registration system in civil-law countries, UK land lawyers and conveyancers referring unhelpfully to European 'cadastral registration systems'.