The Light Brown Apple Moth is an insect belonging to the insect family containing the tortrix moths (Tortricidae). The moths in this family aren't typically pests but this particular species can cause some trouble in gardens and glasshouse.
It originates in Australia, so was probably introduced to the UK by accident. The caterpillars feeding behaviour causes the leaves of apple (and in some cases grapes and berries) to start rolling inwards from the margins.
The caterpillars use these leaves to create a shelter that conceals them whilst they feed and develop, for this reason, they can sometimes go unnoticed.
Young caterpillars will eat the leaf tissue on the undersides of leaves whilst the older larvae construct additional feeding areas using a leaf and fruit or developing buds.
There have been a few recordings of this moth in South Africa, however, they are scarce.