** Shares of UK pub group Marston's MARS.L fall 6.6% to 47.5p, among top losers on FTSE small cap index .FTSC
** Co reports like-for-like sales down 1.5% over 31 weeks
** Also posts recurring free cash outflow of 15.6 million pounds ($21.10 million) in H1 vs 5.9 million pounds inflow y/y
** "In H1, net debt rose by 20 million pounds due to cash tax, capex and working-capital outflows being weighted to H1, whereas operating cash inflows are weighted to H2," Peel Hunt analysts say
** Including session's moves, stock down about 19.4% YTD, while FTSC gains 2.9%
($1 = 0.7392 pounds)
(Reporting by Megha Anilkumar Nair)
((MeghaAnilkumar.Nair@thomsonreuters.com;))