BUZZ-Senior: falls after subdued trading update
** Aircraft parts maker Senior falls 5.7 pct, among the top losers on FTSE 250 mid-cap index
** Senior reaffirms FY 2015 profit outlook and says results would be more second half weighted than historically
** "This is an uncharacteristically subdued statement from Senior reflecting a number of short term challenges," N+1 Singer says in a note
(RM (LSE: RM.L - news) : aastha.agnihotri.thomsonreuters.com@reuters.net)