Important criminal justice organisations

Justice site for legal professionals
http://www.justice.gov.uk/

Crown Prosecution Service
https://www.cps.gov.uk/

Legal Aid Agency
https://www.gov.uk/government/organisations/legal-aid-agency

Public Defender Service
https://publicdefenderservice.org.uk/

The Judiciary of England and Wales (incorporating the Judicial Studies Board)
www.judiciary.gov.uk

Home Office
www.homeoffice.gov.uk

Her Majesty's Court Service
https://www.gov.uk/government/organisations/hm-court-service

Law Society
http://www.lawsociety.org.uk/

Law Society Practice Notes: 
www.lawsociety.org.uk/support-services/advice/practice-notes/

The list includes:
Criminal Procedure Rules 2015
https://www.justice.gov.uk/courts/procedure-rules/criminal

Virtual Courts
https://www.lawsociety.org.uk/support-services/advice/practice-notes/virtual-courts/

Defence Cost Orders
www.lawsociety.org.uk/support-services/advice/practice-notes/defence-costs-orders/

Defence witness notices
http://www.lawsociety.org.uk/support-services/advice/practice-notes/defence-witness-notice/

Withdrawing from a criminal case
www.lawsociety.org.uk/support-services/advice/practice-notes/withdrawing-from-a-criminal-case/

Solicitors Regulation Authority
www.sra.org.uk

Crime Line - low rate subscription web site - incredibly useful site, especially if you need to keep up to date on a regular basis
www.crimeline.info/legal-resources/

Criminal Cases Review Commission
www.ccrc.gov.uk

Guidance on the Police Station Accreditation Scheme
http://www.sra.org.uk/solicitors/accreditation/police-station-representatives-accreditation.page