I've booked DD aPCR for tomorrow following a positive LFT today (she had headache and sore throat). I can see on the gov website that if someone in your household has tested positive you can also book a PCR, but it doesn't say whether that is a positive LFT or PCR. Do I have to wait until we have a positive PCR before I can book one for myself? Also, is there a possibility that the LTF is wrong? I am confused.