I want to know the answer to the following question:
What is the earliest English usage of the term Brytish Illes?
All the background I'm provided with is that "Owing to political and national associations with the word British, the Government of Ireland does not use the term British Isles and in documents drawn up jointly between the British and Irish governments, the archipelago is referred to simply as "these islands".". Is that enough to answer the question?
Answer: no