FRANKFURT (Reuters) - Uncertainty about post-Brexit tariffs makes it harder for BMW to choose Britain as a production hub for an electric Mini, a person familiar with the matter said on Monday.<div><a href="http://feeds.reuters.com/~ff/reuters/technologyNews?a=rdBbZc9n4DI:CDTAyx0i1n4: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=rdBbZc9n4DI:CDTAyx0i1n4:V_sGLiPBpWU"><img src="http://feeds.feedburner.com/~ff/reuters/technologyNews?i=rdBbZc9n4DI:CDTAyx0i1n4:V_sGLiPBpWU" border="0" /></a> <a href="http://feeds.reuters.com/~ff/reuters/technologyNews?a=rdBbZc9n4DI:CDTAyx0i1n4:-BTjWOF_DHI"><img src="http://feeds.feedburner.com/~ff/reuters/technologyNews?i=rdBbZc9n4DI:CDTAyx0i1n4:-BTjWOF_DHI" border="0" /></a></div><img src="http://feeds.feedburner.com/~r/reuters/technologyNews/~4/rdBbZc9n4DI" height="1" width="1" alt="" />