Oh dear, oh dear, oh dear - no wonder there people struggling with IFR and IREX.
(Most of) IFR is quite logical - if you KNOW you are safe, proceed; if you can't be SURE that you're safe, go somewhere safe.
On an approach, the only place that you KNOW is safe, is within tolerance on the approach. So if you're out of tolerance (so god knows what's in front of you now), or if you think the aid might be wrong (god knows where you actually are), you go somewhere safe - UP - NOW.
AIP actually makes it clear, but only in one or two places, CASA drafting
. Go up now, continue tracking to the MAPt, then do the rest of missed approach.
Underfire
Under (a) You must follow the track down to the MDA level, and then climb as directed. It may be a level segment, it may be a direct climb, but you still drive down to that point
No way - don't know what you guys do special over there, but if you do that here, you won't be working for me.