As much detail as you possibly can! There's no point in submitting a couple of vague sentences because they need to know if you would be good enough. Explain the situations and how you'd react almost word for word! It's all in the detail because it's such a roleplay based role!
I just had a look at your application. Although it is slightly on the shorter side, I would have accepted it (I used to deal with NHS apps for around a year), but it appears that regulations have changed...