Both hubby and I dug it - believe it or not - but in one day!!!
I don't remember having back ache because I didn't neither did my hubby, not like this week which has seen us having aches and pains in parts we didn't even know we had !!
So the hole grew to the required depth
As we wanted to keep Koi it had to be a good 4' deep for them to be ok in the winter. A brick wall all round meant a little less digging and a bit more depth.
The next bits will take a while now because we need to let the infill settle for a couple of weeks and then tamp it down. When we come back from our 2 days in Poole we hope to crack on again.