UPDATE 2-Investec warns of first-half profit drop as restructuring costs bite <!-- no image --> <div>* London-listed shares down 6.1% (Recasts, adds detail, background, bullet points, updates shares)<div class="feedflare"> <a href="http://feeds.reuters.com/~ff/reuters/UKBankingFinancial?a=_xd66R448wA:ZlNhalRlJ9U:yIl2AUoC8zA"><img src="http://feeds.feedburner.com/~ff/reuters/UKBankingFinancial?d=yIl2AUoC8zA" border="0"></a> <a href="http://feeds.reuters.com/~ff/reuters/UKBankingFinancial?a=_xd66R448wA:ZlNhalRlJ9U:V_sGLiPBpWU"><img src="http://feeds.feedburner.com/~ff/reuters/UKBankingFinancial?i=_xd66R448wA:ZlNhalRlJ9U:V_sGLiPBpWU" border="0"></a> <a href="http://feeds.reuters.com/~ff/reuters/UKBankingFinancial?a=_xd66R448wA:ZlNhalRlJ9U:F7zBnMyn0Lo"><img src="http://feeds.feedburner.com/~ff/reuters/UKBankingFinancial?i=_xd66R448wA:ZlNhalRlJ9U:F7zBnMyn0Lo" border="0"></a> </div><img src="http://feeds.feedburner.com/~r/reuters/UKBankingFinancial/~4/_xd66R448wA" height="1" width="1" alt=""></div> Posted by Reuters