** BP top riser on a weak FTSE 100, up 2.5pct as market takes maximum 13.7 bln US dollar fine for Gulf ofMexico spill as slight positive, according to two London-basedtraders
** Statement from the oil major says it expects fine to beat the lower end of the range (previous estimates as high as 18bln USD)
** Second day of gains with a firmer oil price also seen as positive
** Stock down 23.5 pct since mid-June
** Broader FTSE 100 index down 0.4 pct
(RM: alasdair.pal.thomsonreuters.com@reuters.net)
BP (BP.)