Seen it all now...
Just bought a couple of made to measure roller blinds on the internet and very nice they are too.
Except for one thing.
Heavy metal ball chain (no 10 gauge, aka 4.5mm balls) - good. Ball chain connectors - special "breakaway" safety type because apparently, somewhere, some numpty has hanged themselves on a roller blind.
Guess what - they breakaway when you roll the blind up (but are OK down).
Anyway - ebay to the rescue for some proper connectors:
And for anyone who does not know what I am talking about, this is the crap useless item:
If I vote UKIP tonight, will they put a stop to this nonsense? Enquiring minds want to know... ;->