Danton plc has 10 million ordinary shares in issue with a current market value of £2.00 per share. The expected dividend for next year is 16p per share and this is expected to grow each year at a constant rate of 4 per cent. The business also has:

• 10.0 million 9 per cent 1 irredeemable preference shares in issue with a market price of 0.90 per share 
• 20 million of irredeemable loan capital in issue with a nominal rate of interest of 6 per cent and which is quoted at 80 per 100 nominal value.

Assume a tax rate of 20 per cent and that the current capital structure reflects the target capital structure of the business.

What is the weighted average cost of capital of the business?