Lewis I am doing exactly the same thing - but as I am doing it this month, I may be able to help you!!
I do not miss meat now (6 days in to my Vegan September [check out my blog!!]) but my best advice for you is to prepare - so packed lunches whenever you can, and just be sure to read all labels because you will be surprised with what contains animal-based products!!
Good luck for next month.
Alex
Excellent advice! I will also mention you in a later post, as this comment will probably get lost in a sea of comments. I wish you the best of luck, and I am now following :-)