On the basis of that plethora of positive and negative information and the photos, nvubu, it has to be Kampala, which took over as capital from Entebbe when Uganda became independent in 1962. That nice lady in green would be the Duchess of Kent, being greeted by the ill-fated, putative president - Milton Obote.
The house pictured is in the typical British colonial style of the early-to-mid 20th century. Know Entebbe from a bit later but, partly because we used to stay at the Lake Vic Hotel and rarely ventured to Kampala, had no idea there was a tiny airstrip there. Open house if correct!