Good news! My project came back, all marked and verified, and I have passed!!
This project (4100 words plus appendix: 23 pages) took up a lot of my weekends, working from 9 - 2 or 3 each day and I really felt under pressure with it as there was a time limit on it, so to have passed it straight off is such a relief.
Thank you to all those of you who keep on telling me that I can do it and to keep going :-)