So The update27 Aug 2021 00:58
is either being held back to be included in the Sept trading update possibly, in a way tomorrow wouldn't be the worst day to release it as will have a long weekend for some nice prominent press coverage of this transformational tie up with these (so far) two huge retailers.
It's a bit confusing as I thought that companys were obliged to release price sensitive info and these two giant retailers equals price changing news but then again it's out in the open for all to see being that the stores are advertising the actual test! The only other explanation is that the company is waiting for sign off from other huge retailers and want to release all at once or they are waiting on something else that they want to include, someone mentioned Amazon tie up a while back so perhaps it's relating to that. There's no way the recent appearance of the tests in those shops is priced in yet as the wider market won't be aware of it until the company update the market via RNS(s) either way tomorrow would be a good time for some RNS(s) to be released!