Security in the design of stations (SIDOS)
With effect from 5 November 2018, the 2012 edition of ‘Security in the design of stations’ (SIDOS) has been superseded. The October 2018 version of SIDOS is available to registered users of the Centre for the Protection of National Infrastructure (CPNI) extranet. Alternatively, appropriate stakeholders with a legitimate need to access the information can request a copy by emailing the Department for Transport Land Transport Security team at firstname.lastname@example.org.
Best practice land transport security guidance on GOV.UK