(1)  A person is not liable to be prosecuted for an offence involving controlled drugs within the meaning of the Misuse of Drugs Act 2001  –

(a) as a result of any admission made in connection with any assessment of the eligibility of the person for the making of a drug treatment order; or

(b) as a result of any admission made in connection with the assessment by a court, or at a case conference convened by that court under section 27I , of the person's progress under a drug treatment order.

(2)  However, subsection (1) does not prevent a prosecution for any offence involving controlled drugs within the meaning of the Misuse of Drugs Act 2001 if there is evidence, other than the admission or evidence obtained as a result of the admission, to support a charge.

(3)  The admission, and any evidence obtained as a result of the admission, is not admissible against the person in a prosecution referred to in subsection (2) .