 ST HELIER, Jersey, May 26, 2021 GLOBE NEWSWIRE -- Caledonia Mining Corporation Plc Caledonia or the Company NYSE AMERICAN: CMCL; AIM: CMCL is pleased to announce an upgrade to the Mineral Resource and Mineral Reserve base at its 64 per cent owned subsidiary, the Blanket Mine in Zimbabwe Blanket.1 Total Proven and Probable Mineral Reserves increased by one per cent to 528,000 ounces 17 per cent increase including depletion of 84,925 ounces since last update and a 12 per cent increase in total Measured and Indicated Mineral Resources MI to 902,000 ounces 23 per cent increase including depletion. 