There are well-established structures for liaison across all forces in England and Wales that Welsh forces and their neighbouring forces avail themselves of. The Association of Chief Police Officers and various staff associations facilitate both formal and informal contact. The National Policing Improvement Agency and Her Majesty’s Inspectorate of Constabulary both promote the sharing of effective practice between forces.
In terms of systems, the Police National Computer and the Home Office Large Major Enquiry System enable forces across England and Wales to exchange information critical to the successful investigation, detection and prevention of crime. All forces have adopted the National Intelligence Model as a way of working; the model itself fosters cross-border collaboration.
Liaison specifically between Welsh forces and neighbouring forces in England also takes place at both a formal and an informal level, facilitated by a number of groups. Issues covered by these groups include distraction burglary, professional standards, major crime review, and drugs.