"Typically in such operations there will be one or more workers (sometimes described as 'gardeners') tending the plants in the particular premises, carrying out what might be described as the ordinary tasks involved in growing and harvesting the cannabis. They will usually, but not always, have had little or nothing to do with the setting up of the operation, but will simply be doing their task on the instructions of those running the operation. They will often be illegal immigrants, who are being exploited because of their vulnerability; and they may well be paid either nothing, but provided with board and lodging, but paid simply enough for subsistence."