Here's a canonical reference for Peter Green's answer (sorry, too long for a comment).

Botswana uses Type D, Type G and Type M sockets. See:

* http://www.iec.ch/worldplugs/typeD.htm
* http://www.iec.ch/worldplugs/typeG.htm
* http://www.iec.ch/worldplugs/typeM.htm

noting the panel to the right contains 'Botswana' in each case.

These are specified here:
https://en.wikipedia.org/wiki/AC_power_plugs_and_sockets:_British_and_related_types

Type G are BS1363 square-pin British sockets (i.e. what you now see in the UK). Types D and M are the old round-pin British 5A and 15A sockets (BS546) which are hardly ever seen in the UK now save for some specialist applications where fused plugs are undesirable (e.g. stage lighting where changing fuses is difficult). They are much better known as South African standard, which is why they are used in Botswana.