While transfers to non-interest pockets tend to be instantaneous it is a different case with transfers to Interest-bearing pockets:
Interest deposits are submitted to our partner, Investec, once per day at 14:00.
Investec will receive the money the next business day and then your funds will be added to your interest pocket.
So if you do a late afternoon interest deposit your money will complete the next business day. If you make an interest deposit in the morning it may arrive by the end of the same day.🙂