Plant identification

[fiorentina]

Please can someone tell me what the tall white flowering plant is in this picture.
I did know and have gone totally blank! Thank you

it looks like an ice plant, although mine are pink, I didn't know you could get white ones.

It’s a sedum of some sort I think.

YES thank you! It is a sedum I am sure. Thanks again.

ice plant = sedum spectabile
and apparently they do come in white!

Yes I saw the white ones in a garden nearby and my garden is largely green and white so thought they’d make good fillers.

Goes by the name of Iceberg