The Royal Navy employed two vessels designated as His Majesty's Hired armed vessel Sir Thomas Pasley during the French Revolutionary Wars. The two vessels were named for Admiral Sir Thomas Pasley. The vessels are also sometimes described as cutters, but more generally as brigs. The Spanish captured the first Sir Thomas Pasley. The second had a brief, but highly productive, career that later led to her crew qualifying for the Naval General Service Medal. After she was returned to her owners in March 1802, she may have been wrecked in the Mediterranean that same year.
Records of their service are far from complete and even their name is ambiguous as contemporary records refer to them interchangeably as Admiral Pasley, Pasley, and Sir Thomas Pasley. (The National Maritime Museum's database has all three names, with considerable overlap in the service notes.) Sometimes the vessel is referred to as Paisley, Admiral Paisley, or Sir Thomas Paisley.