thanks for the replies guys and yes it'll mean some serious thoughts into the pond build ,one of which will have to be laying a 8 metre pipe to my nearest drain , lucky enough after investigating today i can get a 3" pipe to run the whole lenght between the house and edge of the drive with only a 4ft lenght of concrete to dig up

and even better is now i'll be able to pick up a truck from the depot to get rid off the spoil ....HAPPY DAYS

....watch out mark ebay will be getting a battering..lol.
Also looking at a way of nicking another 2 feet in lenght without the wife noticing (theres a joke in there somwhere) i was thinking maybe planting a large bush now and then when its time to dig just move it to the end of the dig and say "it's allways been there love dont be stupid"

...your thought appreciated guy's as i cant lie for toffee and she knows it