By Justine Akakulubelwa: The United Party for National Development -UPND- candidate is leading in the Mongu Mayoral by-election. According to provisional results from 79 polling stations, recorded at the totaling centre for Mongu Central Constituency, Mr. MUYUMBANA, has amassed 7, 532 votes. Patriotic Front -PF- candidate FRANCIS MUNDIA is in second place having collected 607…