You may be right TC about unfinished business and all that as I hate not to finish anything like this.
I would suggest as far as improving this event for ultras would be as already said having a small table set out, maybe with a sign on it to say ultra runners only (marshalls could check our numbers to make sure we're ultras) with a small drinks supply say, water and squash perhaps and also some minor sweets. These sort of things don't cost much to put out and they help to keep us all happy at the end of the day. Also you wouldn't need any more marshalls to support these stops as you could just use the ones you already have. I think having a water stop between checkpoints would also be a good addition in future. Also agree with the going through the relay checkpoints for crowd boost.
I too am doing this event and would normally be doing Doyen as a last Ultra of the year but organisers haven't answered any of my questions and have put price of entry up quite ridiculously high.
I will be starting off around 8am (WHAT!!) as I think i'll need around 6-7 hours to complete too I hope others will be around at the finish so maybe some of us ultra runners can get together and get a cab back to Peterborough (6 miles back apparently) or else its a long slow run back to car.
It was listed as full weeks before the race itself on the Runners World website as a friend of mine tried to register online. Even if it still said entries on the day, if you can't register through the website, then thats a pretty good indicator.