Bradders yes it is a hilly bugger. I ran it as a recci couple of Sundays ago and it certainly tests you. Theres a beaut of a hill at 8.5 mile called Walton Road. It just goes on forever and you can see the top all the way up but it never seems to arrive. When I did it a couple of weeks ago the rain was coming at me sidewards with a hint of hail in it and there is absolutely no shelter at this point. It was ace 
BBC weather is looking like sleet light snow so hopefully will be ok underfoot. If you dont know the area it is high and open so can be windy too so I would recommend not forgeting the hat and gloves!!
Its a well organised event and I'm sure we will all have a great time as on most races we do.
Good luck everyone and enjoy