Thanks again to all who replied, much appreciated. Is it terminal or are there signs of life still? trying to flower so that's a bonus I suppose?

Thanks for the reply Ralph. I can't see Mealy bug, so could be mildew? What's the best way to treat that please?

Thanks for the advice and suggestions. Another better photo attached (marginally better!)

Good evening,

I wonder if anyone can identify and suggest a fix for the pest or disease on this Aylostera perplexa please. The photo has been blown up loads to try to show it. When seen through a loupe it is like a white powdery substance.
Many thanks in advance.

This is MAMMILLARIA COLUMBIANA Salm-Dyck subsp. COLUMBIANA, very slightly different to columbiana

It would be nice if you talked and pointed out to the viewers which is which in the collection? Video's are so much better with sound. :-)

My roof is going up and down rather alarmingly, but still hanging on at the moment!!

Yes, thanks. Already repotted Oh and yes, just a few ££s

Here is another steal from Sainsbugs (other Supermarkets are available) Again no label but in the section of attractive green plants!! Any help with ID would be most welcome.
Many thanks in advance.