I did 4 tests today, 2 clear blues and 2 Tesco's own

The clear blues I know say neg but the Tesco ones have a very (VERY) faint line

Soo confused...

Someone help!

You may be able to see the faint lines on the Tesco ones if you look closely

Anyone know which ones I should listen to? I did them all today (afternoon) and they haven't changed since...

(They don't do pink dye in UK cus I've never heard of it until looking at pages on here)