Oct. 27 (Bloomberg) -- The following is a list of companies whose shares may have unusual price changes in U.K. and Irish markets today. Stock symbols are in parentheses and prices are from the last market close.

The benchmark FTSE 100 Index fell 50.83, or 1 percent, to 5,191.74. The FTSE All-Share Index declined 1 percent and Ireland’s ISEQ Index dropped 1.7 percent.

ARM Holdings Plc (ARM LN): The U.K. chip designer whose products are used in Apple Inc.’s iPhone said third-quarter revenue climbed to 75.2 million pounds ($123 million) from 71.7 million pounds a year earlier. Revenue had been predicted at 73.6 million pounds, the average of 11 analyst estimates compiled by Bloomberg. The stock declined 1.8 pence, or 1.2 percent, to 149.2 pence.

BAE Systems Plc (BA/ LN): The U.K. Serious Fraud Office is expected to delay its corruption charges against Europe’s biggest weapons maker until next year, the London-based Times reported, citing people in the legal profession. The shares rose 1.6 pence, or 0.5 percent, to 318.9 pence.

BP Plc (BP/ LN): Europe’s second-largest oil company posted a 34 percent drop in third-quarter earnings after crude prices slumped 42 percent from a year earlier. Net income declined to $5.34 billion from $8.05 billion in the same quarter of 2008, the company said. Excluding one-time items and inventory changes, earnings beat analyst estimates. The stock rose 2.1 pence, or 0.4 percent, to 567.1 pence.

Debenhams Plc (DEB LN) and Home Retail Group Plc (HOME LN): Debenhams, the U.K.’s second-largest department-store chain, and Home Retail were rated “overweight” in new coverage at Barclays Plc. Debenhams stock lost 2.2 pence, or 2.6 percent, to 81.6. Home Retail slipped 7 pence, or 2.3 percent, to 298.6 pence.

GlaxoSmithKline Plc (GSK LN): The U.K.’s largest drugmaker and Genmab A/S won U.S. approval of a new leukemia treatment for patients who don’t get better on drugs such as Genzyme Corp.’s Campath. The shares fell 6.5 pence, or 0.5 percent, to 1,230 pence.

Marks & Spencer Group Plc (MKS LN) and Next Plc (NXT LN): Marks & Spencer, the U.K.’s biggest clothing retailer, and Next were rated “underweight” in new coverage at Barclays. Marks & Spencer slipped 2.2 pence, or 0.6 percent, to 345.1. Next lost 35 pence, or 1.9 percent, to 1,835.

Royal Bank of Scotland Group Plc (RBS LN): Stephen Hester, chief executive officer of Britain’s biggest government-owned lender, said the bank supports “the need for reform” and he agreed banks “need to change the way they pay,” the Daily Telegraph reported, citing an interview. The shares declined 2.66 pence, or 5.7 percent, to 44.42 pence.

Yell Group Plc (YELL LN): The publisher of the U.K.’s Yellow Pages phone directory said it extended the deadline for its refinancing proposals a second time. The stock fell 5.95 pence, or 10 percent, to 52 pence.

To contact the reporter on this story: Ben Martin in London at bmartin38@bloomberg.net.

Last Updated: October 27, 2009 03:28 EDT