I tested this morning with a tesco test... taken the advice on here about wasting money on expensive ones... and... drum roll...
THERE@S A VERY FAINT LINE!!! I've checked it against an unused test and there is definitely no faint line in the unused one.
Could it be? Dare I believe it?? I always thought that a line, no matter how faint, is a line!
Anyone else used tesco tests???