Sue Black & S. Lucina Hackman 
Expert Witness, Forensic Science, and the Criminal Justice Systems of the UK [PDF ebook] 

The global nature of crime often requires expert witnesses to work and present their conclusions in courts outside their home jurisdiction with the corresponding need for them to have an understanding of the different structures and systems operating in other jurisdictions. This book will be a resource for UK professionals, as well as those from overseas testifying internationally, as to the workings of all UK jurisdictions. It also will help researchers and students to better understand the UK legal system.