** Shares of Premier Inn owner Whitbread WTB.L down as much as 8.56% at 2,948p
** Top loser on London's FTSE 100 .FTSE, which is down 0.18%
** WTB reports H1 adjusted PBT of 316 million pounds ($423.91 million) vs 340 million pounds year ago
** Co reduces FY adjusted PBT outlook for Germany segment to 5 million pounds from previous guidance range of 5 million to 10 million pounds
** Hargreaves Lansdown analysts say that "weaker-than-expected performance in its fledgling German operation and economic uncertainty in the UK mean the immediate path ahead is becoming difficult to plot"
** YTD, up to Wednesday's close, stock up nearly 9.5% vs FTSE's 15.2% gain
($1 = 0.7454 pounds)
(Reporting by Simone Lobo in Bengaluru)
((Simone.Lobo@thomsonreuters.com; +919920570373;))