Coodem - Nope, I got a partial for a speed unstable approach, which was perfectly fair.
At the risk of digressing, it may be worth bearing in mind my experience when you guys go for the test: I had cancelled 2 previous tests due to weather. On my third test day the forecast wind at 2000 feet at Luton was 340/30. Assuming Cranfield experienced similar winds, this would have been 12 knots tailwind on the approach for runway 21. I was prepared for that and expected a circle to land at 800’. NB: The wind on the ground at Cranfield was a westerly, so 21 was in use.
As things panned out, I passed everything up to the point of commencing the NDB approach back at Cranfield. The actual wind at the time was 010/30 in the hold according to the G1000. This gave me at least 20 knots of tailwind on the final approach which is way outside the test limits, but once you're in the air and have successfully completed the rest of the flight you might as well give it a go!
However, I was tired after over an hour of the test and flustered because my hold was poor (but passable apparently) and shocked when I came round base turn I realised I was zooming along with that tailwind and…er…I decided too quickly and, er, forgot the gear. 
Hence the speed unstable approach and my partial. 
My advice, taken by my mate who passed the test immediately after my partial, is therefore to do the ILS rather than NDB back at Cranfield if the wind is from the north or north-east. The extra guidance provided by the glideslope and localiser makes the ILS a safer bet IMHO.
Two final points: Firstly, Cranfield tend to use 21 for take off and landing even with a small tailwind on the ground, so don't assume anything. Secondly, the Examiner has to see you do a single-engined go-around back at Cranfield, so even if you're doing a circle to land on 03, you'll probably go down to MDA/DA as appropriate, go around, climb to 800' and then circle to land. IIRC, that was my briefing, but I will stand corrected if anyone knows better.
Matty - I was allowed to use GPS until within 20 NM of CIT and the Examiner made me change it to DTY before I switched to CIT.