Thanks for the replies guys, yes, the image was slightly underexposed, I've never really shot film before so I have a lot to learn, I tried to add some for extension but obviously not enough, it will be interesting to see my next bunch of transparencies which I should get back by the end of the week.
The day wasn't overcast, rather the opposite, there weren't any clouds at all. The time of day though did help reduce contrast, and yes, I was probarbly a stop under what I could have used. Currently I'm using my d200 as a light meter, which doesn't help, but the main problem is just my lack of experience.
This was scanned at home on an Epson V700, there is actually much more detail in the shadows on the transparency, so it hasn't captured everything, which is a shame.
I added most of the vignetting in PS during processing, I thought it helped stop your eye wandering out of the frame and added to the atmosphere, whilst helping to hide the oof bottom right corner and the very dark shadows which seem to be due to the scanner. Should I remove it?
With the colour cast, I left some of it in because thats how I remember the scene, is it very distracting?