I've actually never had a positive on them, ever! I took one when a superdrug, Asda AND a digi confirmed it and it was still negative! I have no actual idea why I bought them today! Mainly because my train was coming and I needed to be quick and it was literally all they had (must have been a lot of women peeing on sticks in London today! I saw three other women buying tests at the same time as me!) x