Admiral Manners is currently described as an English admiral. He was an admiral in the British Royal Navy. The first line of the wiki page for that organization refers to the Royal Navy of the United Kingdom. There is no 'English' navy after 1701, nor is there a Scottish or Welsh one. Royal Navy officers serve the whole of the United Kingdom. Accordingly, I feel he and other members of British military forces should be referred to as a British admiral. I have made that change.
All that you say (up to where you describe him as "a British admiral") is well and true, but doesn't preclude the statement that he was an English admiral who served in the British Royal Navy. Still, I've no argument with how the lede is worded at present. Alfietucker (talk) 16:14, 19 October 2013 (UTC)