In article , JennyC
writes

It's high up on the toilet window sill, so I don't bother watering it.
Atm it has orange flowered aloes and grey echeverias, but I really need
something that will trail down the front. I've tried a trailing sedum
'burro's tail' (can't remember its botanical name) but that didn't
survive the winter.

So I need something succulent, doesn't need full sun (it faces E and
there are trees blocking the sun from S) that can tolerate wet soil and
low temperatures in winter (though obviously there is some heat loss
from the toilet which means it isn't as cold as it would be in the
ground).

Kay

Bit of a contradiction there Kay !!

'dry window box' 'wet soil'

Wet soil in winter, I said. Do I have to spell it out and say that the
dry soil is in summer? ;-)

There's a couple of trailing succulents which would fit the bill, but they would
like to be dry in winter.........I'll look the names up asap

It's wet rather than waterlogged - ie, it's compost with reasonable
draininage, but it doesn't necessarily have time to dry out between one
rain shower and the next.
--
Kay
"Do not insult the crocodile until you have crossed the river"