How do I recognise drugs?

There is no certain way to identify illegal substances except by analysis. However signs to look out for include:

• Small plastic or elaborately folded wraps
• Burnt foil and spoons, syringes and small bottles
• Herbal substance or a solid, crumbly brown resin
• Shredded cigarettes
• Unusual pills, powders or liquids in small quantities
• Strong sweet smoky smell