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* FTSE 100 up 0.3 pct
* ARM soars after Softbank bid
* Miners track metals prices lower
* TUI, Thomas Cook retreat on failed Turkey coup
By Kit Rees
LONDON, July 18 (Reuters) - UK shares opened higher onMonday, buoyed by a jump in ARM Holdings' after Japan'sSoftBank Group Corp agreed to buy the British chipdesigner.
SoftBank agreed a deal worth 24.3 billion pounds ($32.2billion), sending ARM Holdings shares up 42.9 percent to arecord high.
"An increase in inbound M&A was one of the obviousconsequences of Brexit and weakened sterling but few expected itto manifest itself so quickly or at so large a scale," DanRidsdale, analyst at Edison Investment Research, said in a note.
ARM's rise accounted for all of the gains on the UK'sblue-chip FTSE 100 index, which was up 0.3 percent at6,690.09 points by 0818 GMT.
Mining stocks were the biggest losers after the price ofcopper extended falls on a stronger dollar, which makesdollar-denominated commodities more expensive for holders ofother currencies.
BHP Billiton, Anglo American, Rio Tinto, Glencore and Antofagasta were alldown between 1.3 percent and 2.1 percent.
Travel stocks were also under pressure after a failed coupin Turkey.
Tour operator TUI fell 1.7 percent, and mid-capThomas Cook dropped 2.4 percent.
"It is just one thing after another, really. Every time youthink the sector might be free of problems, then another onecomes along," Chris Beauchamp, senior market analyst at IG,said.
"I think the fact that the coup didn't last very long, thefact you haven't got ... any further fighting will perhapscushion the impact. But people will look at Turkey and think,'well, why don't I go elsewhere?'"
The FTSE 100 index is up around 7.7 percent so far thisyear, having hit a year high last Thursday. It has recovered 5.6percent from a slump after Britain voted to leave the EuropeanUnion on June 23. (Reporting by Kit Rees; editing by John Stonestreet)
