(1) Where on or after the 6th day of April, 1974, new machinery or new plant (other than vehicles suitable for the conveyance by road of persons or goods or the haulage by road of other vehicles) is provided for use for the purposes of the trade of working a qualifying mine, that machinery or plant shall, if it is not qualifying machinery or plant, be deemed for the purpose of section 285 to be qualifying machinery or plant.
(2) Where on or after the 6th day of April, 1974, and before 1 January 2011, a person carrying on the trade of working a qualifying mine incurs capital expenditure on the provision of new machinery or new plant (other than vehicles suitable for the conveyance by road of persons or goods or the haulage by road of other vehicles) for the purposes of that trade, there shall be made to the person for the chargeable period related to the expenditure an allowance equal to 20 per cent of the expenditure, and such allowance shall be made in taxing the trade.
(3) For the pu
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