Question to the Department for Transport:

To ask the Secretary of State for Transport, who is responsible for decisions to incorporate a security screening machines in UK airports; and who is responsible for the effectiveness of those machines.

The Secretary of State for Transport is responsible for setting the security measures that should be applied in the UK. The Department for Transport advises the industry on equipment that may be used for screening at an airport. This is set out in the DfT Approved Equipment List https://www.gov.uk/government/collections/aviation-security-screening-approved-equipment-list . All such equipment meets the standards set by the European Civil Aviation Conference (ECAC) of which the UK is a member.