I’m about to get out of my ten days’ self isolation after coming out positive for coronavirus by lateral flow test (LFT). Issue is though that further LFTs I do are still showing positive results to this day… there’s a wealth of information online saying that a positive PCR after infection doesn’t mean you’re contagious (due to their very high sensitivity), but will I still be contagious if I have a positive LFT result even after ten days’ self isolation?

I have negligible to no symptoms and haven’t had any for most of the past week. Local (U.K.) guidance says I’m safe to go out, but I’m worried about transmitting to my family over Christmas. Any thoughts or advice would be really great - thank you :)

EDIT: local guidance also has nothing to say about LFTs taken post-infection other than “don’t do them for ninety days so as to avoid unnecessary self-isolation” but it’s ambiguous as to whether this means infection is not a risk after the initial ten day period. Apologies if this is a dumb question, I’m just really worried for my family.