"MadCow" wrote in message
...

I want to squeeze a tiny pond into my tiny garden - maybe a metre by a
metre and a half. A rigid liner of irregular shape looks good for this
but does anyone know how to create a hole that matches the shape of the
liner?


An alternative to digging a full sized hole is to install the rigid liner
into the equivalent of a raised bed. If you excavate a hole for the deep
water section, the spoil can be used to help support the marginal section.
Something like log-roll screwed to timber stakes can be used as a temporary
retaining wall when you're backfilling under the margins.