On my site survey installer said he was running a Spur off the main feed onto the Meter and out directly to the Ohme Unit. As the meter is in a wall box outside he is not going near the fuse box. He did check Earthing points in the house. The Spur will be fused inside the Meter Housing. My Installation is booked in for Tues 17th. Hope that helps.
Some, but not all, of that makes sense to me, given my poor electrical knowledge ? Unfortunately my electric meter is inside the house which, I guess, adds yet another level of complexity?