Thanks Karen, I confirm that yes, I will apply from London. What I have not specified, cause I did not think it would make a difference, is that my nationality is Italian, though I have been living in the UK since 1998 (my degree in Civil Engineering has been obtained in England).
I am getting a bit paranoid cause I had previous experience with US Immigration, and after being sponsored 4 times for working visas (1 of a year, the others only for seasonal work), the 5th time it got rejected and they didn't even say why. I understand NZ is a different story from the USA, but my concern is, a part from not having any post graduate experience on my field of study (which anyway you said it does not matter, given that is not a requirement anymore - while up to about 2 years ago I remember it was, I got lucky there!), that in the last 4 years after my graduation (2009) I have been working in restaurants as a waiter to earn a living, plus I have been out of work for the last 9 months for various reasons. Is applicant's age a factor they also consider? (since I am 45 yrs old!). Now that I am about to fill the form, I dread what they would think reading Section E2 of the application....that's my main worry, but anyway I can't do anything about that. Thanks for your great help anyway, you and JandM are the my guiding stars in this forum!
PS: by the way, interview done, got the job!!!