** Shares of UK pub group Marston's MARS.L up 10% at 55 p, biggest gainer on London's small caps index .FTSC, which is down 0.01%
** Co says Christmas bookings are strong and 11% ahead, compared to the same point last year
** MARS reports preliminary FY adjusted pretax profit of 72.1 million, above 42.1 million pounds ($55.22 million) year ago
** MARS says LFL sales for 8 weeks to Nov 22 are tracking in line with the prior year
** Up to Monday's close, stock had risen 13.64%, compared with a 5.38% increase in FTSC
($1 = 0.7624 pounds)
(Reporting by Simone Lobo)
((Simone.Lobo@thomsonreuters.com, +919920570373))