There are multiple socket types used in Sudan (C / D). There is no one type that is more common than any other so you may be faced with any one of the sockets pictured to the right. Under these circumstances the best recommendation that we can make is that you invest in a worldwide adaptor that is a single unit capable of connecting to multiple socket types.
Voltage - The mains voltage in Sudan is 230 V which is compatible with all UK appliances (UK voltage is currently specified as 230 V +10% / - 6%).
Frequency - The frequency in Sudan is 50 Hz which is the same as the UK.