By James Davey LONDON (Reuters) -British clothing retailer Next reaffirmed full-year guidance that was cut in September as it reported a 0.4% rise in third-quarter full-price sales, slightly ahead of its expectations, sending its shares higher. Next, which trades from about 500 stores and online and is often considered a gauge of how British consumers are faring, said on Wednesday it still expected full price sales for the rest of its 2022-23 year to fall 2% and a full-year pretax profit up 2.1% to 840 million pounds ($967 million). The group said full-price sales in the last five weeks of its…