Last update for now.

Promise this is the last one for now.
With Mrs K working Jak and I went out early this morning to sort some things out. Although it was full of water I lifted all the sides of the liner and dug out more earth because I wasn’t happy about the way it was lying. I continued to fill it and now I am much happier. 
I installed the pump and filter, and the fish are back in.
All that’s left is to tidy up the liner and add the new capping around the brickwork.