Trauma Who Cares NCEPOD report from 2007 that talked about the need to standardise trauma across the uk to improve outcomes. An older document be relevant to the centralisation of trauma services in Major Trauma Centres in England and provides recommendations for improvements in practice.
Manual from the ATACC course available free online or the link above.
The Anaesthesia and critical care course is supposed to be really good involving prehospital trauma care, no doubt much more exciting from ATLS.
Management of traumatic cardiac arrest from the Resus council
Guideline from the Resus Council on the management of traumatic cardiac arrest. The European resuscitation guidelines on the management of cardiac arrest in special circumstances are more in-depth (see page 14 of the document)