methamphetamine use is said to have reached epidemic proportions.

Methamphetamine can be cooked up using a handful of household chemicals, but byproducts can include toxic waste in the local water supply, fires and explosions.

Globally, users are said to outnumber those of heroin and cocaine combined, but its prevalence in the UK is still a matter of some debate.

The UK is further removed from the suspected "meth labs" of Mexico and south-east Asia, than Australia and the rural US, where methamphetamine use is said to have reached epidemic proportions.