As far as I know Millers have stopped doing private kills - I could be wrong, they may have changed their minds. We now use Munroes at Dingwall which is a trek from Fraserburgh (we use Beedie bros to carry them) - they offer a butchery service and delivery back to our area. When we've used Millers you have to arrange your own butcher then collect when ready - another trek for all concerned.
Most abbatoirs now are only interested in large batches of animals....