I'm CEV so get them free, DD works in a SEND school so also gets them free. We've both been ill with covid symptoms for a week but have consistently tested negative on the NHS LFTs. She found some of the old Orient Gene ones at school, we did them, and immediately we both got a strong positive.
We've noticed for a while now that the amount of buffer has been reduced, so I don't know if it's that. They were always pretty reliable in the past - this is my seventh covid infection, DD's third, so we were both fairly confident we had it as we recognise the symptoms. Thankfully I haven't taken my medication because I was so sure, but DD has had to go into work because she was testing negative. She says loads of staff have been ill but testing negative on the NHS tests.
Has anyone else noticed this? It's worrying because I have to be as sure as I can be that I'm negative when I take my meds, and DD works with some very vulnerable children.