lbl half yearly, page-12

From a funding perspective, my calculations suggest they can achieve internally funded growth of around 13%pa with no gearing or 18% at a debt:equity of 60%. This is a "status quo" calculation in terms of presumption of achieving consistent return on investment. Also allows for current payout ratio to be maintained.

This sort of calculation is a bit GIGO but should provide an okay indication while the business is running at capacity (it's not such a good calc for businesses with a high proportion of fixed cost).