54. Instruments which may be rectified.

In a proper case the court will rectify a court order1, a deed of settlement2, an appointment3, a deed of revocation4, a deed of variation5, a lease6, a bond7, a bill of exchange8, bought and sold notes9, a tax computation10, a schedule of quantities annexed to a contract to execute works for a gross sum, purporting to show how the gross sum is made up11, an insurance policy