ID Succulent please

This plant was next to me and I would guess it was about three-four meters tall. Any ideas? Thank you.

 

Looks similar to this plant listed as a Pencil cactus (Euphorbia tirucalli)
Never can be sure of images and descriptions on the tinterweb though.

https://www.picturethisai.com/image...14168607.jpeg?x-oss-process=image/format,webp

 

Hi @dowlish and thank you very much. I believe that is it. My photo is of a plant in a garden next door to where my friends were staying here a few years ago. It was ginormous ... I cut me out f the photo in a trikini which truly showed its height. I saw another yesterday ... but I can't remember exactly where! I am sure I appropriated a cutting of the first so must search later this morning.

Again, thank you. Vxx

 

Just in case anyone is interested, I have found cuttings from a supplier I have used ...
bebch0 on eBay