Sure... :c)
It's the grading system for administrative and clerical and clinical jobs (not including directors/dentists/doctors) that came about after agenda for change. Before that, they were all seperated out. So a band 5 for example means you have to have a degree or equivalent level of experience to do the job, as far as I'm aware, all newly clinically trained staff come in at that (nurses, therapists etc), it's a fairly high level for admin and pretty much I think the last admin level that high before you end up being some sort of manager or very speicalised role.
Bands 2 & 3 tend to be health care assistants (any ward) and reception staff or quite junior admin posts.
Bands 6 and above imply a specialty so you'd be a specialist nurse or a particularly senior nurse or practitioner or administrator, can't remember what the requirements are and a band 7 would at need to be at least a masters level (or equivalent) in terms of qualifications. The highest is a band 9 and I only know of two people at this level from my old trust, the chief pharmacist and the professor of the physcists (something to do with radiotherapy and running the equipment).
That alright?