I really wish it was, Leggi, alas, I think not,
Thanks Auntiemaid and Robot, I've checked your ideas but I don't think it is. Gary, I think you're onto something, I'll know better when it flowers, thankyou!
Growing to about 4ft, silver-grey leaves with prickles ans a thistle like flower emerging at top of stem, unknown colour as yet not flower. Looks amazing but no idea as to name. Please help!