I'll take more pictures when I find my camera charger!
Its not black spot at least it doesnt look fungal to me, and I look at fungus on a regular basis
The garden centre I bought it from had them in a large rather chilly! greenhouse and when I got it the soil was practically sand it was so dry although I have a feeling that I am to blame for its demise because its got a lot MORE yellow leaves now :/
How come I can grow the most complicated stem cells that require 8 different hormones in different concentrations yet when it comes to a relatively simple plant it goes pear shaped! Need more practice
Cheers for the help.