Good for you...now the fun starts.
A few years back I also partialled at Cranfield after a dodgy ILS and then to my horror failed it at the second attempt...the thought of a full re-test was almost too much to contemplate during the flight back to Stapleford.
After the failure I realised that my mental preparation had just not been up to scratch...it was just a 10 minute flight and the Examiner was already in the plane with one engine running when I arrived after a fellow student had just passed his partial. So there was no planning, pre-flighting and briefing as such which would normally help you to focus before the test. There was an element of hurry-up and I was not in "Exam" mode, more "Once quickly round the circuit" mode and this undid me.
For others in this situation I can only say put in the same level of preparation for the partial as you did for the full test and this includes mental preparation, don't let yourself be rushed, and you should be fine.
Re-did the full test and it was one of my best flights....including the memorable debriefing "That was satisfactory, why the heck didn't you do that last week?".
I learned from the experience, maybe others can too. It's never held me back since.
Best of luck to all!