At last the day came for us to put the new liner in place, laying on top of the old one. This was on 23rd October 2015.
In the photo above you can see a large object in the pond. This was an old plant tub made of durable plastic and which Rob had opened the bottom of, intending it to be a refuge for the fish.
Once the liner was in place we were able to empty three water butts of rain water, and pump the contents of a well into the pond; in all, about 1000 litres. We put back the five goldfish which had survived the herons' visits, together with large clumps of the oxygenating weed.At the end of the day there was about 8 inches of water in the bottom of the pond, and within minutes of being introduced the fish were enthusiastically exploring every inch of their new habitat.