We are going to be moving both the water and electric connections around to the new utility room. This was something that got missed off the original budget and can be a significant cost.
We have decided to dig the trench now. Once the new extension is built, the access would be severely limited by this trench. So we are going to do it now, lay the pipework and fill it back in before the porch is built.
We are also going to put connections into the outbuildings for both water (for the orchard and polytunnel) and electric for the sheds (lighting and power).