Why Britain is not interchangeable with England

Does the distinction between England and Britain matter when discussing the Royal Navy?

Yes. British covers the wider set of national and territorial identities represented by and connected to the Royal Navy.

England and Britain are distinct because English, Scottish, and Welsh identities matter within the United Kingdom even when outsiders treat the labels as interchangeable. British can also encompass communities associated with the Isle of Man, the Channel Islands, and other territories. In a naval context, that wider wording better describes the people and places connected to the Royal Navy. The exchange shows why the service's institutional identity cannot be described as solely English.