By Simon Kennedy

LONDON (MarketWatch) -- The U.K.'s benchmark index lost ground Tuesday as mining stocks came under pressure, though a handful of mid-cap stocks posted solid gains after well-received trading updates.

The FTSE 100 index fell 1.1% to 5,755.88 as worries over a potential interest-rate hike in China weighed on commodity prices and mining stocks.

 
   Xstrata PLC  and Antofagasta PLC  both dropped 3.1%, while Rio Tinto PLC   (RIO) declined 2.5%. 
 

Bank stocks also weighed on the benchmark index as uncertainty over sovereign debt and a potential bailout of Ireland continued to concern investors.

Shares in Lloyds Banking Group PLC (LYG) fell 1.4% and Barclays PLC (BCS) dropped 1.9%.

Several companies reporting earnings and trading updates had a better session.

House builder Taylor Wimpey PLC rose 3.6% after it said profit would be towards the top end of its expectations and added that it has agreed on the terms of a new credit facility with a group of lenders.

Cable & Wireless Worldwide PLC rose 2.5% after it said public-sector margins will only fall slightly, tempering worries about trading conditions after it issued a profit warning earlier this year.

TalkTalk Telecom Group PLC was another mid-cap riser, adding 4.9% after reiterating its guidance.

On the downside, shares in Punch Taverns PLC dropped 4.8% after the firm said its Finance Director Phil Dutton will leave the company next year.

Low-cost airline easyJet PLC dropped 2.5% after saying pretax profit for the year jumped to 154 million pounds ($247 million) from  £54.7 million and that it expanded its fleet by 24 aircraft, which will give it a total of around 220 aircraft by September 2013.

 
 
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