I've done three tests this morning, all the Flowflex type, all three showing positives results. The first was read after 25 minutes, the second and third more like 35.
It does say not to read the results after 30 minutes but are they likely to be accurate? I've never seen a result like this, even on the DCs tests which have often been left on the kitchen counter all day from being used to test in the morning.