Seaking
I have not done this course, but did another MSc a few years ago.
My general experience was:
1 - Be prepared to allocate at least 12 hours per week for reading, on top of assignments and other formal stuff
2 - If you haven't done a first degree (I was a management direct entry with A Levels) then make sure you have a very supportive personal tutor to get you up to speed in academic skills.
3 - Be prepared to question what the textbooks and the lecturers say - this is a Masters degree and the uni will expect you to show mastery of the subject
If you can't find anyone through PPrune who has done the course, ask City to introduce you to two or three past students to talk to, they should have no problem doing that.
Apart from that, enjoy yourself - its a great challenge and very rewarding.
Hope these general comments will help.
F3G