UPDATE 1-ASOS confirms appointment of Kate Bostock to key role

* Bostock to join firm as exec director, product and tradingin Jan

* Robert Bready resigns from firm to "pursue freshchallenges"

LONDON, Oct 10 (Reuters) - British online fashion retailerASOS on Wednesday confirmed the appointment of KateBostock, the former head of non-food at Marks & Spencer ,as a senior executive director, ending months of speculation shewould join the firm.

Bostock, who as head of general merchandise at M&S was oneof the most powerful women in the British retail industry, willjoin ASOS in January as executive director, product and trading,reporting to Chief Executive Nick Robertson.

Bostock's departure from M&S after a period of poor tradingwas announced in July but she did not officially leave thecompany until Oct. 1.

Linked with ASOS for nearly a year, Bostock has years ofexperience in fashion and retail. She worked for Nextand then George at Asda, a subsidiary of the world's largestretailer, Wal-Mart , before joining M&S.

ASOS, which targets young women looking to emulate thedesigner looks of celebrities like Alexa Chung, TulisaContostavlos and Kate Moss, also said product director RobertBready had resigned "to pursue fresh challenges" after sevenyears at the firm.

Last week, ASOS said Brian McBride, a former managingdirector of Amazon in the UK, would succeed Waheed Allias chairman from Nov. 1.

Shares in ASOS, up 57 percent over the last year, closedTuesday at 2,267 pence, valuing the business at 1.85 billionpounds ($2.96 billion).

($1 = 0.6251 British pounds)

(Reporting by James Davey; editing by Neil Maidment)

((james.davey@thomsonreuters.com; +44 20 7542 7674; ReutersMessaging: james.davey.thomsonreuters.com@reuters.net))