By Sara Sjolin, MarketWatch

LONDON (MarketWatch) -- Rio Tinto PLC led U.K. stocks higher on Tuesday after an upbeat production update, while shares of Burberry Group PLC fell sharply on news its chief executive will leave to join Apple Inc.

The FTSE 100 index jumped 0.7% to 6,554.31, putting it on track for a four-day winning streak.

Posting the biggest gain in the benchmark, shares of Rio Tinto (RIO) climbed 3.9%, after the mining giant said its iron-ore output rose to a new quarterly record.

Other mining firms mirrored the strong upward move for Rio Tinto, with shares of Antofagasta PLC up 2.8%, Glencore Xstrata PLC (GLCNF) rising 1.6% and Anglo American PLC 3.1% higher. Metals prices were, however, mostly lower.

Adding pressure on the index in London, shares of Burberry slumped 5.9%, after Apple (AAPL) named the luxury-goods firm's Chief Executive Angela Ahrendts as senior vice president of retail and online stores.

"[It is] natural for investors to react with caution to the news of her exit, although in truth, it's unlikely to change little at Burberry as Christopher Bailey, the company's chief creative officer, has been appointed to replace her in mid-2014," said Ishaq Siddiqi, market strategist at ETX Capital.

"Investors appear to be worried that Bailey may not be able to replicate the success of Ahrendts -- after all, he has not previously [run] a business, especially one of that size, and Ahrendts did transform the company [into] the luxury giant it has become with strong growth from emerging markets, formidable digital operations and strong group sales," he added.

Among other notable movers, shares of WPP PLC climbed 2.9% after the advertising giant said it acquired Chinese media agency IM2.0 for an undisclosed sum.

Outside the main index in London, shares of Royal Mail PLC gained 1.7% on the previously government-owned firm's first day of unconditional trading. The postal service started conditional trading on Friday and has since rallied close to 50% compared with its initial offering price of 3.30 pounds ($5.27) a share. The surge in share price has fueled criticism the government sold the company too cheap, with the parliament now escalating an investigation into the valuation.

Man Group PLC jumped 6.1% after UBS added the investment firm to its most-preferred list.

UBS added Schroders PLC to its least-preferred list, sending the shares 0.4% lower.

On the data front in the U.K., the Office for National Statistics said the consumer-price index grew by 2.7% year-on-year in September, above expectations of a 2.6% print.

"Inflation is likely to bobble around its current level for a few months, as utility-price hikes come through, but will fall towards the Bank of England's target [of 2%] through next year, easing the squeeze on people's pay and putting this consumer-led recovery on a firmer footing," said Rob Wood, chief U.K. economist at Berenberg. "The return of productivity growth will keep inflation under control and allow real wages to start rising again in the second half of next year," he added.

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