This citation style is based on entirely on Bournemout University Harvard Style. It is aimed at NHS Staff and Librraians who want to create records with abstracts and notation on access to full text.
NHS OpenAthens accounts are available to anyone working in the NHS who has an .nhs.uk or nhs.net eMail address. Anyone eligable can self register for an account. The note is a reminder about access to full text enabled by subscriptions provided by Health Education England Core Content and NHS health care libraries. Access via NHS OpenAthens is extensive but not universal, hence the reference to IF AVAILABLE..