Coal miner Minergy, which operates the Masama mine, in Botswana, has put its planned listing on the LSE’s Aim on hold as a result of unfavourable market conditions. “We remain committed to listing on the Aim, but current unfavourable market conditions are making it extremely difficult, with uncertainty surrounding Brexit weighing on decision-making," CEO Morné du Plessis said in a pre-close update to shareholders, published on Thursday.