The sentences quoted in this table are maximums only and are not reflective of sentences given in the majority of drug offences, for more guidance on this issue please go to our section on. Please note that not all controlled substances are listed in this table - a is available from the Home Office. Trafficking offences refer to all supply offences including conspiracy or attempt to supply; production offences and offences involving importation and exportation. Consult Release or a solicitor for information on substances not covered in the table.