Hywel, is this Echinocereus rigidissimus ?

Yes it is.
It's actually a variety called rubrispinus, because the spines are red.
I've got photos of one flowering, in two blogs called 'The Teddy Bear's Ears' and 'A Colourful Display' ... which I wrote last summer.

The succulent in the same pot is Crassula perforata :o)

Thank you Hywel, I will look for your blog.
And thanks for the ID of the succulent. I think I should be able to remember that.

y w

Wow!! another lovely cactus:-O

amazing geometry!

The artist in you can see that.

LoL but no way could I draw it!!