The Leveson inquiry will hear today from Detective Chief Inspector Brendan Gilmour. DCI Gilmour worked on the Metropolitan Police's Operation Glade, which looks into police corruption.
The temporary Assistant Chief Constable of Devon and Cornwall police, Russell Middleton will also give evidence. He was involved in Operation Reproof about an officer allegedly supplying private investigators with information from the police national computer.
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The decision represents something of a victory for the president who will now be able to enforce most of his controversial 90-day ban.
Cool in the north, warmer air to the south
Police have warned the drug, known locally as "pink champagne", could be deadly.