UPDATE 2-Oil majors, exporters boost FTSE 100; Fed minutes eyed

* FTSE 100 up 1%, FTSE 250 up 1%
* Main index up as investors hopeful on Fed mintues
* Oil majors boost FTSE 100
* OneSavings, Charter Court slip after warning of Brexit
impact
* Capita gains on GS upgrade

(Adds news items, analyst comment, updates to closing price)
By Muvija M and Indranil Sarkar
Aug 21 (Reuters) - London's FTSE 100 rose on Wednesday as
oil majors tracked gains in crude prices and exporters
benefitted from a weaker pound, while markets waited for minutes
of the U.S. Federal Reserve's July meeting for signs of further
policy easing.
The main index .FTSE added 1.1% to post its largest gains
in nearly three weeks, with a boost from Shell RDSa.L and BP
BP.L helping the index recover most of the previous session's
losses. The mid-cap FTSE 250 also rose by the same level.
BAT BATS.L , AstraZeneca AZN.L and other stocks that book
a major chunk of their earnings in dollars gained from a fall in
sterling as investors took little heart from hints by German
Chancellor Angela Merkel that there might be room for Brexit
negotiation as chances of a no deal grow. NMC Health NMC.L , a United Arab Emirates-based healthcare
provider, climbed more than 4% to be among top FTSE 100 gainers
ahead of Thursday's scheduled trading update.
The overall mood was cheery ahead of the Fed's minutes with
hopes of lower interest rates in the near-term to cushion blows
from a bruising U.S.-China trade war and quell fears of an
impending recession.
On U.S. President Donald Trump's Tuesday comments about
confronting China over trade, Spreadex analyst Connor Campbell
said, "that kind of talk puts even more pressure on the Fed to
safeguard the American economy, meaning investors are going to
be on high alert for hints."
Investors have steered clear of riskier assets in recent
weeks, putting the FTSE on course for its worst month in four
years and making the Fed's minutes all the more crucial.
Merging mid-cap lenders OneSavings OSBO.L and Charter
Court Financial CCFS.L gave up 5% and 4.6% respectively, after
they warned of the Brexit impact on housing and credit.
"The bank warned it will tighten its lending criteria on
account of the 'macroeconomic outlook' and that played on
traders' minds," CMC Markets' analyst David Madden said.
Ryanair RYA.L slipped 1% after a London court rejected the
Ireland-based budget carrier's application to prevent some of
its British pilots from going on strike later in the week.
Rating actions drove steep moves among mid-cap and small-cap
stocks.
Outsourcing group Capita CPI.L surged 3% after Goldman
Sachs upgraded the stock. Small-cap Nostrum Oil & Gas NOGN.L plummeted 22% to an
all-time low after Berenberg slapped the stock with a
double-downgrade on its rating and slashed its price target to
25 pence from 200 pence.