(5) Where any money is due to a farmer, trader or related business, as the case may be, under any policy of insurance on any of the property comprised in a fixed charge, the insurer may, despite anything contained in the insurance policy, pay such money to the holder of the charge to the extent of the said charge, and any such payment shall be a valid discharge of the liability of the insurer to the farmer, trader or related business, as the case may be, to the extent of the amount so paid, and subsection (4)(b) shall apply to the amount so paid as if it had been paid to the holder by the farmer, trader or related business, as the case may be.