Are Drug test fails in prisons coming down ?

Just read this interesting bit of news from 20/4/09 online at bbc online:

Conditions at a prison are improving with a drop in the number of inmates failing drugs test, a government report says.

Featherstone Prison near Wolverhampton is now a high performing prison, the Chief Inspector of Prisons said.

The number of drug test failures is down from between 30-35% per month in 2007 to 4%, the prison said.

The prison has recently introduced NVQs in recycling and Rugby Football Coaching qualifications.

The prison was inspected in October last year.

http://news.bbc.co.uk/1/hi/england/8008999.stm