Hey! After finding all the clue and calculating the coordinates, I tried to find the cache. The position was jumping around on my GPS. One time it was in the middle of one of the lakes, the next minute it was on either end. After an hour of running around the lake, I decrypted the clue, rechecked the calculation and figures I still could not pin point a reasonable location. I put the blame on the US capturing Sadam Hussein (or thats at least what they where telling us in the news, after I came home again). Apart from that I had a great time in the park and getting there (starting of in Cambridge I followed the Cam River until I took a left after a lock and entered the park through its back gate). It was sunny all day and so I had a little picknick (the close by Tesco is close enough to do some last second shopping). Thank your for the coordinates, and I will give it another try as soon as I am back in the UK.