ID of a spiky friend please.

[plan b]

cheers for the help everyone, im going to go with yucca recurvifolia, now ive seen Simba's in flower that is identical to mine

[Dave Brown]

I had a nice filamentosa flower year before last,last year looked pretty crappe all year then sent suckers up late in autumn.ive chopped the lot up now and got over a dozen new yuccas out of it.the pot was full of them,even sprouting out the holes in the bottom

My first Yucca was filimentosa, and it does not trunk. It just clumps and flowers, and clumps..... etc