Isn't the test void rather than negative if you don't swab?
@dollybird I think what the poster meant is that lots of people just upload a 'negative' result from a home LFT onto the NHS site without bothering to do the actual test. You just scan the barcode, enter all your details, and when it asks you the result, say 'negative'. Then you've got proof of negative status for whatever but haven't actually tested. That's why I think you should have to at least upload a picture of the lines on the test.
Meanwhile, I'm still here testing positive on Day 7 and my Dad on Day 9, so looks like Christmas is still off for me (another person in the house is CEV so we are isolating in a single room and leaving the house free for the others).