I'm not looking for a link, but anyone working in the dispensary needs to be started on a dispensing NVQ2 (or equivalent) within 3 months of starting work (or taking up the role). Much the same with counter staff "regularly involved with the sales of retail medicines".
However, this is a matter of professional standards rather than legislation; your boss is leaving themself open to some pointed questions from the inspector, or, if the worst happens, a judge.
You can ring your local inspector
http://www.rpsgb.org.uk/pdfs/inspdetailseng.pdf
and have a chat..... they're pretty good at "just happening to notice" during a visit.