* FTSE 100 down 0.3 pct
* TUI adds 4 pct to Thursday's 6.6 pct jump
* Glencore touches an all-time low (Updates with closing prices)
By Liisa Tuhkanen
LONDON, Aug 14 (Reuters) - Britain's top equity index edgedlower on Friday, with a decline for commodities stocks, such asBP and Royal Dutch Shell, overshadowing gains intravel group TUI.
The blue-chip FTSE 100 index closed down 0.3 percentat 6,550.74 points.
Oil producers and oilfield service providers led the losersas U.S. crude oil prices dropped to their lowest in almost 6-1/2years, with huge stockpiles and refinery shutdowns heighteningconcerns about global oversupply.
"Ongoing commodity demand restraint in China alongsideincremental supply growth out of OPEC and the US continue to beformidable market headwinds," Goldman Sachs said in a note.
Royal Dutch Shell, Weir Group and Tullow Oil all fell 1 to 2.6 percent, roughly in line with the FTSE350 Oil & Gas Financial index.
BP fell 1 percent after a U.S. judge on Thursday found thatit had manipulated the natural gas market in 2008, as alleged bythe U.S. energy regulator.
Glencore slipped to touch an all-time low after theminer and commodity trading group said it had sold stakes inthree mines for about $290 million.
"It's very difficult to know whether or not we'll see anyrecovery on that one," London Capital Group analyst Brenda Kellysaid.
"Ultimately, the commodities market does remain underpressure," she said.
On the upside, TUI was the biggest blue-chip gainer after JPMorgan and Jefferies lifted their target price on the stock,sending the company up 4 percent after a jump in the previoussession when it forecast earnings at the top end of analysts'expectations. [ID;nL5N10O0QV]
Among other individual gainers, chipmaker Arm Holdings edged slightly higher.
"ARM's equity story will continue to be one based on strongtop-line growth contributing to sector-leading earnings and cashflow growth," Barclays wrote in a note.
"We see both near- and long-term prospects being as strongas ever, although recent concerns around end market growth havecaused a material underperformance for ARM shares."
The FTSE 100 rose to a record 7,122.74 points in late Aprilbut has since given up most of the gains it made in 2015. (Editing by Robin Pomeroy)
