We have Bar-throated Apalis in our garden regularly (always). This morning I nearly mistaken them for this fantastic little bird, only 6g - a Fairy Flycatcher !!! The nearest I have seen them in our area is Koppies, half way between Villiersdorp and Worcester.
According to the Rob Martin and Jessie Waltons Kogelberg Birdlist, the most recent record is of a single bird at Rooiels on 23 June 2008. A winter vagrant to the area.