(2) in which prisons mobile telephone signal blockers are in operation.
The National Offender Management Service is trialling a variety of technologies in a number of establishments in support of our strategy to minimise the number of mobile phones entering prisons; find mobile phones that are smuggled into prisons; and disrupt mobile phones that we cannot find. For security reasons, it is not appropriate to disclose the location of these trials.
This is a challenging area of work where we are working closely with mobile network operators and Ofcom where appropriate to ensure full evaluation of the pilots.