Admiral Frederick Beauchamp Paget Seymour, 1st Baron Alcester, was a British naval commander. He was commander of the Channel Squadron between 1874 and 1877 and Commander-in-Chief of the Mediterranean Fleet between 1880 and 1883.

The Channel Fleet and originally known as the Channel Squadron was the Royal Navy formation of warships that defended the waters of the English Channel from 1854 to 1909 and 1914 to 1915.