WCA handbook 19th March 2013 (internal guide for medical services)
Medical Services Update to Understanding Communication –
This is an update to guidance given to Atos health professionals on how to interpret the Understanding communication descriptor. http://freepdfhosting.com/890031276f.pdf
Please consider joining www.benefitsandwork.co.uk who create these guides. They often offer discounts on annual membership. Being a member gives you access to their forum in which you can ask questions. If your question is too personal or not included in the forum already then you can send a private message to their staff who are extremely knowledgeable.