now would be good. scrape back the soil to make sure they have their own roots. If they have then use a sharp knife or bread knife and cut the 'pups' away from the stem with as much root as possible. Pot up and water well.

Is it a cordaline rather than yucca?

Apologies seaburngirl, cordaline is correct ,old age is overtaking me.
I will do, just as you state , many thanks again. I will keep you informed.