I don't work in admin but I work in the NHS and work closely with our admin staff. Honestly there is no real answer to your questions. Every single role in every single department is completely different. Contact the agency to find out the details. You will get some on the job training relevant to the post. They won't train you to do admin if you've never done it before though. They need staff that have experience and are competent. And it's more likely to be an on going job for a few weeks/months. They won't employ bank admin to cover one shift.
Thank you for replying. I do have a qualification in business administration but that was from many years ago. I have been doing healthcare roles and only had one admin job doing data input and general office duties.
I work in admin for the NHS. We usually use Bank staff to do the more time consuming mundane jobs that we don't have time to do. We don't have any paper files as everything is uploaded to the patients files so no filing as such but this is very time consuming. Any new people to Bank in my area gets training on our in-house computer system. However I would say that every NHS department is different.