Staff at HMP Leeds prison in Armley seizing dozens of drugs every month

It comes as drug finds in jails across England and Wales reached a record high – but prison reform charity the Howard League has warned confiscations do not show "the true scale of the problem".

Ministry of Justice data reveals 353 searches uncovered drugs within HMP Leeds in the year to March 2020 – the equivalent of roughly 29 seizures every month.

However, that was down from 421 the previous year,

Over the same period, 8% of the mandatory drug tests conducted in the prison returned a positive result, while in 2018-19, the figure stood at ​17%.

The figures include psychoactive substances, the abuse of which have increasingly become a concern for prison staff nationally, as well as so-called traditional drugs such as cannabis and methadone.

-> Burglar used washing-line prop to break into West Yorkshire house then used stolen card to buy Greggs breakfastThe most common single drug type found to have been taken in Leeds prison was cannabis, which was found in 32% of samples.

Across England and Wales, a record 21,575 searches by prison staff revealed drugs in the year to March 2020, with prisoners failing 14% of random drug tests.

Frances Crook, chief executive of the Howard League for Penal Reform, said drugs are a "scourge" in prisons.

She added: "Ministers have spent millions on tightening security, and this may be having an effect, but the best way to reduce the supply of drugs into prisons is to reduce the demand for them.

"Staff time spent monitoring scanners would be better deployed in building relationships and working with people in prison to keep them occupied with work, education, training and exercise."

-> 'Incompetent' gunman fired shots at rival's house to prove he was a 'hard man' during feud after punch-up in Yorkshire pubMs Crook said this is one of the reasons why current Covid-19 restrictions in prisons should be eased "safely and as soon as possible".

During the pandemic, prisoners have been unable to take part in recreational activities such as using gyms and libraries or going to worship.

Last year, Her Majesty's Prison and Probation Service set out plans to crack down on the misuse of drugs in prison, with a focus on restricting supply, reducing demand and building recovery services.

As part of the strategy, HMPPS pledged to reduce the proportion of random mandatory drugs tests that are found to be positive by March this year.

Separate figures reveal that Leeds prison met its 9% target for traditional drugs tests in the year to March 2020. The 8% target for psychoactive substances was also met, although the data for this only covers a four-month period.

A Ministry of Justice spokesman said: "We are finding and stopping more drugs thanks to the tough new measures brought in by this Government, such as airport-style security and x-ray body scanners."

He added that it would be "misleading" to draw conclusions on the impact of restricted prison regimes during lockdown.

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Laura Collins