UPDATE 2-FTSE 100 slips on uncertain U.S.-China trade prospects

* FTSE 100 down 0.2%, FTSE 250 up 0.3%
* Uncertain trade picture weighs on sentiment
* Kingfisher rises after naming new CEO
* Mid-cap Senior slips after Boeing 737 MAX faces new
setback

(Adds news items, analyst comment, updates to closing prices)
By Shashwat Awasthi
June 27 (Reuters) - London's FTSE 100 ended lower on
Thursday as initial investor optimism gave way to uncertainty
amid conflicting reports on whether Washington and Beijing would
commit to a trade truce, while Glencore skidded after a mine
collapse in Congo.
The FTSE 100 .FTSE closed 0.2% lower, after slipping as
much as 0.5%. The mid-cap FTSE 250 .FTMC added 0.3%, helped by
a relatively steady pound.
Markets had initially welcomed signs of progress in the
trade talks after the South China Morning Post, citing sources,
said the United States and China had agreed to a truce before
leaders of the two nations meet at the G20 summit. That helped shares of Asia-focussed banks such as HSBC
HSBA.L and miners such as Rio Tinto RIO.L gain on the FTSE
100.
However, the blue-chip index's fortunes reversed after The
Wall Street Journal reported that Chinese officials would insist
on the removal of sanctions on technology firm Huawei, among
other proposals, as part of any agreement.
"There are decent signs that the apparent return of poise to
risky assets may not run deep," Cityindex analyst Ken Odeluga
said.
"We can now expect an awful lot of newsflow on trade and
tariffs over the next two days, so it's wise to be cautious
about reading too much into statements," Markets.com analyst
Neil Wilson said.
Glencore GLEN.L gave up 5%, its biggest one-day fall in
almost a year, after a mine owned by the company collapsed in
southwest Congo. The company confirmed that 19 artisanal miners
had died and warned of possible further fatalities. [nL8N23Y583
But home improvement retailer Kingfisher KGF.L added 4.2%
after it named Carrefour's CARR.PA Thierry Garnier as its new
chief executive. Mid-cap Senior SNR.L , which makes a variety of components
used in commercial and military jets and counts Boeing BA.N as
one of its top customers, tumbled 10% on news that U.S.
regulators had identified a new risk to Boeing's grounded 737
MAX.
The stock endured its worst day in more than 2-1/2 years as
a rating downgrade from Barclays also weighed. Shares of Pendragon PDG.L , hammered earlier this month
after a profit warning, slid 5.7% after the car dealership said
its chief executive would step down because of a "difference in
priorities", delaying its strategic review. "We maintain our view that Pendragon's problems are multiple
and deep-rooted and that any management team will face an uphill
challenge in the current trading environment," Liberum analysts
wrote.