In December, four cabinet ministers warned in a joint statement that Lynas must export all waste material from its plant or see its operations suspended.

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Jill Ambrose, chief marketing officer of CourseSmart LLC, a joint venture of five leading education publishers that offers digitized course material, said it was likely that relatively few high school students today own an iPad because of the cost.

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"This is because a substantial quantity of potentially explosive pharmaceutical material - Isosorbide Dinitrate (ISDN Pure) - has been identified on the site following a recent joint inspection by the Health and Safety Executive (HSE) and Environment Agency Wales, " explained the council officer.

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In a statement, the council's chief executive, Colin Everett, said "a substantial quantity of potentially explosive pharmaceutical material - Isosorbide Dinitrate (ISDN Pure) - has been identified on the site following a recent joint inspection by the Health and Safety Executive (HSE) and Environment Agency Wales".

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