In article , Tim Watts
writes

Those in the pool with be OK. It's at the point you setp out of the pool
onto concrete with one foot in one foot out you have problems.

Not so, assuming it were a live extension, both live, neutral and
potentially earth would be present at the floating extension. It would
only take a small proportion of any leakage current being diverted to
through the body (alternate parallel path) to risk electrocution, so
those in the pool would be at risk too.
--
fred
it's a ba-na-na . . . .