Hi all I bought a cactus roughly 10 years ago as a child and have recently kindled an interest in it, however I am yet to discover its actual name! I have done plenty of research but can’t seem to nail it do a name. it’s now approx. 14 cm tall, it has numerous ‘smaller growings’ beneath it, it is column shaped, it has soft white ‘spikes’ , it is green. the conditions here in England are not ideal, however it gets decent light from the sun as it is directly by a window and room temp is approx 25 degrees C. I would love to know what it is so all help is appreciated see attached photos of it. Thanks George