First photo was yesterday about 11am (the photo with white background) second photo just at 8.30am this morning (with bathtub in background).. these are asda cheapest which are 25mIU/ml, I've got some first responce on the way as I ran out as I did one of those yesterday too (see image) do you think the asda cheapest have gotten darker?
This was both within the time frame of 3 mins.