Prince Harry last visited Lesotho in June 2010 when his brother, the Duke of Cambridge, accompanied him as part of their first joint overseas trip.
The pair visited a number of charitable projects, including the Mamohato Network Club for children affected by HIV at King Letsie's Palace in Maseru, Lesotho.
Prince Seeiso, the younger brother of Lesotho's King Letsie III, will accompany Prince Harry on part of his current trip.
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Two private citizens have already paid a "significant deposit" to take the week-long trip.
Slippy start tomorrow with frost & ice