<div>TEXT-New UK PM Johnson's arrival speech in Downing Street</div> <!-- no image --> <div>Boris Johnson took over as Britain's prime minister on Wednesday, succeeding Theresa May with a promise to take the country out of the European Union on Oct. 31, "no ifs or buts".<div class="feedflare"> <a href="http://feeds.reuters.com/~ff/reuters/UKBankingFinancial?a=4do45whPLIE:HGi3_gY9_dA: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=4do45whPLIE:HGi3_gY9_dA:V_sGLiPBpWU"><img src="http://feeds.feedburner.com/~ff/reuters/UKBankingFinancial?i=4do45whPLIE:HGi3_gY9_dA:V_sGLiPBpWU" border="0"></a> <a href="http://feeds.reuters.com/~ff/reuters/UKBankingFinancial?a=4do45whPLIE:HGi3_gY9_dA:F7zBnMyn0Lo"><img src="http://feeds.feedburner.com/~ff/reuters/UKBankingFinancial?i=4do45whPLIE:HGi3_gY9_dA:F7zBnMyn0Lo" border="0"></a> </div><img src="http://feeds.feedburner.com/~r/reuters/UKBankingFinancial/~4/4do45whPLIE" height="1" width="1" alt=""></div> Posted by Reuters