I have some potential bad news, the NHS in Scotland will interview all day, usually just for one position this normally takes 15min per candidate, as they may well look to fill 8 positions they will look at the person in more detail, rather than qualification. How personable you are and will you fit in! they will allow aproximately 20-30 mins per candidate, not allow you to talk for hours.
The interview list will be aprox 18 to 20.