Think I'll leave discovering if it has an alarm for another day, don't really fancy being deaf.
Also, just noticed something else...
When testing the wipers I decided to fire her up as she's been parked for a couple of days. first attempt it couldn't hold the revs and cut out - figure this is hopefully just due to being sat in the cold. On the second attempt I gave it a few revs which seemed to do the trick, however I still had the bonnet open and noticed the engined jolted a little bit when being revved, sat perfectly still when idling but moved maybe an inch or so when revved. Don't know if this is usual on Micra's but thought it was worth checking, probably just how its mounted but better to be safe I guess.
