The H5 strain is different from the deadly H5N1 strain that has claimed more than 60 lives and millions of birds and livestock since December 2003. The bird came from South America, and was held with 216 birds from Taiwan.
As the death was in quarantine, the UK's disease free status is unchanged. Experts said detecting the virus shows the quarantine system is successful.
Meanwhile, Russian officials said a new bird flu outbreak has been found in part of the Ural Mountains that was hit by disease during the summer. Authorities there are checking the condition of seven people who had contact with sick birds.
U.S. Health and Human Services Secretary Michael Leavitt said there's no reason to think bird flu won't spread more. He said wild birds are serving as carriers and the disease can be expected to spread along their migration routes.
