Hi, my first post! I have got to work building s wildlife pond. It’s 4.7x4.5m at the widest points and roughly 60cm deep (still digging!) I need to reinforce the banks by building in a retainer/backfilling etc but all that is planned for next week when the kids go back to school! The garden is completely new, after it was totally stripped to bare soil/rubble during building work, new fences etc, but I am slowly getting there... me and my back lol! Anyway, I’m getting a bit confused about pond liners and wondered if anyone had recommendations please I’m going to big up the underlay as we have clay over chalk (and what appears to be the county collection of bricks, paving slabs, wire and polythene!) so there’s a lot of flint! The entire area around the pond will be planted up and lots of cover, it just looks a little bare right now! Thank you!