I'm very sceptical about some of these figures. I lived in Malawi in 2011/12 and the population of Lilongwe then had just overtaken that of Blantyre at around half a million if you include all the outlying settlements. Has it really doubled in 5 years? Leeds can surely only be said to have > 1 million people if you include Bradford. Population of Liverpool in 2018 was under half a million. Need I go on?