Paragraph 20
If the Agency considers that circumstances exist which, had it foreseen them (and possessed the same scientific knowledge it does now) at the time, it would have refused under paragraph 2 of Part 1 to grant a licence, it may give notice to the licensee—
(a)
explaining why it would have refused to grant the licence; and
(b)
informing the licensee that, unless the licensee persuades it in writing not to do so within a period of twenty-eight days after the sending of the notice, or such longer period as it may allow, it will cancel the licence.