LONDON (Reuters) - London could lose its position as the leading destination for start-ups in Europe if it does not remain open to the best talent after the British vote to leave the European Union, investors warned on Monday.<div><a href="http://feeds.reuters.com/~ff/reuters/technologyNews?a=L9geG_3YSHE:Tb7-mA1bdp0:yIl2AUoC8zA"><img src="http://feeds.feedburner.com/~ff/reuters/technologyNews?d=yIl2AUoC8zA" border="0" /></a> <a href="http://feeds.reuters.com/~ff/reuters/technologyNews?a=L9geG_3YSHE:Tb7-mA1bdp0:V_sGLiPBpWU"><img src="http://feeds.feedburner.com/~ff/reuters/technologyNews?i=L9geG_3YSHE:Tb7-mA1bdp0:V_sGLiPBpWU" border="0" /></a> <a href="http://feeds.reuters.com/~ff/reuters/technologyNews?a=L9geG_3YSHE:Tb7-mA1bdp0:-BTjWOF_DHI"><img src="http://feeds.feedburner.com/~ff/reuters/technologyNews?i=L9geG_3YSHE:Tb7-mA1bdp0:-BTjWOF_DHI" border="0" /></a></div><img src="http://feeds.feedburner.com/~r/reuters/technologyNews/~4/L9geG_3YSHE" height="1" width="1" alt="" />