Thanks for the info, just read the AAIB report.
Like the last line, "the pilot stated that it was the wrong decision to attempt a takeoff at all and concluded that he would not be operating a DA-42 from a wet grass surface again."
I always took off and landed on runway 22 with the Twinstars at Stapleford - two thirds of which is hard surfaced anyway.
Just sad really, it was a lovely aircraft. Still have a picture of her in my study...