Beecham, L. 1999. 
"Missed GP appointments cost NHS money"
British Medical Journal, vol. 319, no. 7209, pp. 536.

Department of Health 2009. 
The NHS Constitution: A consultation on new patient rights. 
Available here

Department of Health 2012. 
Quarterly Hospital Activity - Published data.  
Available here

Kennard, J. 2009. 
Missed Hospital Appointments Cost NHS £600 million. 
Available here

Health Inequalities National Support Team resources 
see here

Quality Improvement in NHS Services
see here