AIM-list African budget airline Fastjet (LON:FJET) saw its share price sink by 24.69% to 0.12p (as of 15:45 BST) after posting a trading update. Commercial flights in South Africa and Zimbabwe have been cancelled since early April until at least the end of July. Cash headroom for operating expenses remains tight and management believe that the group may struggle as a going concern if restrictions continue beyond the end of August.