CORRECTED-UPDATE 1-Stronger pound drags FTSE 100 lower as virus worries remain

(Corrects milestone in first paragraph to April, not June; Adds
dropped letter in headline)
* Galliford surges on return to profitability forecast
* Whitbread jumps on Barclays' upgrade to 'overweight'
* FTSE 100 down 0.1%, FTSE 250 up 0.1%

By Devik Jain
Nov 13 (Reuters) - London's FTSE 100 retreated on Friday as
concerns over rising COVID-19 infections hit mining stocks and a
stronger pound pressured exporters, although the index looked
set to post its best weekly gain since April on hopes of an
effective vaccine.
The commodity-heavy index .FTSE fell 0.1%, with energy
.FTNMX0530 and mining .FTNMX1770 tracking lower oil and
metal prices. O/R METL
A stronger pound also weighed on dollar earners such as
British American Tobacco Plc BATS.L , Experian Plc EXPN.L ,
Diageo Plc DGE.L and Unilever Plc ULVR.L .
The domestically-focussed mid-cap FTSE 250 index .FTMC
added 0.1%. Both indexes are set for their second straight weekly gains,
aided by new local stimulus measures and as U.S. drugmaker
Pfizer Inc PFE.N said on Monday its COVID-19 vaccine was 90%
effective.
"Markets have just run out of steam as we're now out of the
initial hubbub of the U.S. election and on the other side of
this vaccine news," said Connor Campbell, a financial analyst at
Spreadex in London.
U.S. President-elect Joe Biden cemented his electoral
victory by capturing the battleground state of Arizona late on
Thursday, but the transition to his administration remains in
political stasis as President Donald Trump refuses to accept
defeat. Meanwhile, a day after UK reported 33,470 new cases of
COVID-19, its highest daily total to date, British transport
minister said he would be making an announcement on changes to
the country's 14-day quarantine rule for travellers "very soon".
In company news, Premier Inn-owner Whitbread Plc WTB.L
rose 1.1% after Barclays upgraded the stock to "overweight",
while Rolls-Royce RR.L jumped 5.6% after JP Morgan raised its
target price on the stock. Construction firm Galliford Try Holdings Plc GFRD.L surged
15.3% after forecasting a return to profitability in the first
half of this financial year.