Maybe guidance has changed in the past couple of months: the booklet with the box of tests given to my wife sometime before xmas says that if you have a positive LFD test you should tell your manager, self-isolate and get a confirmatory PCR test, then:
"If your PCR test is positive you DO NOT need to self-test using the LFD for 90 days, from the date you become positive."
Maybe guidance has changed in the past couple of months: the booklet with the box of tests given to my wife sometime before xmas says that if you have a positive LFD test you should tell your manager, self-isolate and get a confirmatory PCR test, then:
"If your PCR test is positive you DO NOT need to self-test using the LFD for 90 days, from the date you become positive."