(Reuters) - Thailand's Pornanong Phatlum finished the third round as she started it, with a one-stroke lead at the Women's British Open in Lancashire on Saturday.
Phatlum carded a composed three-under-par 69 at Royal Lytham & St. Annes, while England's Georgia Hall matched the score by sinking a 10-foot birdie at the last.
Phatlum, who has never won in nearly a decade on the LPGA Tour, will head into Sunday's final round at 13-under 203.
Hall is alone in second place on 12 under, with former women's world number one Ryu So-yeon of South Korean on 11 under after a 67.
Australian Minjee Lee and Japan's Mamiko Higa both bogeyed the last to card 71 and slip three strokes off the pace, where they were joined by South Korean Park Sung-hyun (69).
(Reporting by Andrew Both in Cary, North Carolina; Editing by Clare Fallon)