Programmed activity is split into DCC (direct clinical care) so things like a clinic, surgery etc usually patient interaction, and non DCC or SPA (supporting programmed activity) which is usually the more clerical admin side. And yes usually a PA is half a day, as is SPA but it can be reduced.
some people for example for every 1 clinic will do half an SPA admin, others (specialities differ) will do 1 spa to 1 clinic. Then there’s other responsibilities such as clinical lead, governance lead, educational supervisor, any work they might do for theBMA or unions, or teaching that they get PA for.
in medicine (I can’t remember much detail about surgery now) in my trust, average would be maybe 3 clinics a week, 3 SPA/admin sessions, some form of leadership/development role (such as respiratory lead, or Frailty Improvement programme lead likely 1 SPA each, educational supervisor (half a PA per junior doctor) on call commitment which varies trust to trust, ours at the moment is about 1 PA a week equivalent (but places vary how they pay this).
they all go through a tiger pjs job planning programme where every second is accounted for. This is signed off by department lead, then clinical director and I as manager for medicine, then it goes up to the Assistant Medical Director and the Assistant director of operations for final sign off. Then it goes to someone else senior in medical HR and the med director or their deputy for “job planning matching” where they make sure everything’s been done fair and equitable and right.
doctors are then rostered to these duties and expected to fulfill them.
long way of saying yes 1 PA is about half a day.