I've just transferred doctors and been looking at their website this afternoon - it says new runny nose, headache, sore throat, fatigue, cough or fever can be signs of Omicron and to get a PCR, not LFT! This is obviously more than the three main symptoms the government say to test for. The Zoe app was saying the other day if you live in London and have cold symptoms, it's more likely to be covid.
Just thought I'd mention as many (including myself) are reluctant to test for other symptoms as we don't want to waste PCR capacity and the cost.