I have spoken to so many people recently who said that they had symptoms but didn't get a PCR as they had covid within the last 90 days so thought they were exempt from testing.
You are only exempt from LFTs, not PCRs.
Government and NHS rules say to get a PCR with new symptoms even if you've had covid in the last 90 days www.nhs.uk/conditions/coronavirus-covid-19/testing/test-results/positive-test-result/
I personally now know 3 people who've had covid twice within 2 months. And with Omicron now dominant it's even more likely that people will get reinfected.
The top 5 symptoms are now: runny nose, headache, fatigue (either mild or severe), sneezing, and sore throat.
www.bmj.com/content/375/bmj.n3103
If you have cold symptoms, don't rely on LFT tests, get a PCR.