cheers for the comments guys will take it all into account going to try meet up with the utility surveyor to go through things, really wanna get started now told my girlfriend it'd be water tight for christmas! haha... never know this credit crunch could free a bit of time up!! thanks
its 2750mm from my proposed gable to the centre of the drain thats why i was wondering if thet would let it go... thought about just getting it piled but dont really want to be spending a couple of grand on that, united utilites have not really been much help made me wait 2 weeks before telling...
the invert is 2.8m deep, i know you normally have to dig to the depth of the invert but didnt really want to be digging that deep, only 825mm to strip foundation on my house, drains runs along my proposed gable end.