From the website:
This tutorial is a beginners' guide to the Latin used in documents between 1086 and 1733. It is the first online tutorial to help you learn the Latin from this period. Try our new Advanced Latin
The tutorial covers the period between 1086 and 1733, when Latin was the official language of documents written in England.
Knowing Latin will help you to read documents from this period. After 1733, official documents were written in English.
No previous knowledge of Latin is required. This tutorial is suitable for everyone who wants to learn.