Fans of British mining stock Sirius Minerals (SXX) may be interested in another potash company called Kore Potash (KP2:AIM) which has just listed on the UK stock market.Analysts reckon it has a world class project which is likely to have some of the lowest operating costs in the industry, implying scope to make healthy profit margins if potash prices hold up.Later this year Kore will have to raise