The Crime Line wiki, set up by Andrew Keogh, contains a wealth of information on criminal law and criminal justice. Clicking on one of the headings on the left hand side of the Home page takes you through to more information on, for example, Evidence, PACE, Prison Law and Terrorism.
From the wiki it is also possible to subscribe to the CrimeLine Updater, a free weekly email newsletter containing information on new case law, legislation and news.
Whilst generally entries are of a high quality, Crime Line is an open access project. This means that anyone can contribute to the wiki simply by creating an account. So, always check what you are reading against other sources such as books, academic journals and legislation / case law within LexisLibrary and Westlaw UK.