Looking for the name, go to questions thanks

Not sure! I can name the one on the right. It's a pile of rocks, but I guess that doesn't help a lot.

Well spotted, so it must be a rockery plant of some sort

My powers of observation frighten me at times!!!!

Thanks all EUPHORBIA MAMMILLARIS VARIEGATA although there is still many of them, but it gives me a starting point 'cause I just got to 'ave it.