Applying elementary commonsense, aren’t you incredulous 9m tests only result in 300 Positives? In my link an expert highlighted the existence of a False Positive Rate and the Health Secretary agreed a FPR of about 1%. This figure could be higher or lower, but seriously do you really believe as low as 0.003%? Or is this figure similar and as reliable as a Marxist-Leninist Albanian election result?
Another elementary observation is those testing Positive are mostly otherwise healthy, so they’re testing Positive for something that isn’t making them ill, hence easy to conclude the Positive is a False Positive.
And if in doubt do a second test, but this is something the government refuse to do, no doubt to keep the figures as high as possible.