** ITV falls back from 15-yr highs hit recently indecent volume after issues Q1 trading update
** Net advertising revenue up 12 pct in Q1, slightly aheadof analyst expectations; NAR expected to be up 5 pct in H1
** Stock had strong recent run, 4th-top UK blue-chipperformer YTD, up c.24 pct; market participants flag highexpectations into numbers
** Stock, down 2.6 pct, 3rd-top FTSE 100 faller(behind Sainsbury & Kingfisher which are bothtrading ex-dividend ) (RM: tricia.wright1.thomsonreuters.com@reuters.net)