Government scientists are being sent to the V Festival to analyse samples of so-called legal highs amid renewed warnings against taking the party drugs.
The Home Office is launching a national campaign highlighting the risks of legal highs including laughing gas, which was more widely used than powdered cocaine and ecstasy last year.
They are aiming to gather information about which new substances are available in the UK, and the latest Home Office annual report on the trends is due to be published today.
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The suspects were arrested by West Midlands Police and will appear before Westminster Magistrates' Court in London on Friday.
The former Wales international is expected to discover the new trial date at a hearing later today.
With dozens of stores making losses and 11,000 jobs at risk, BHS's main task is to return as much money as possible to creditors.