Misleading article since as they state "44 per cent involved people who tested positive in the 14 days before hospital entry. A further 43 per cent were made within two days of admission". Thats 87% are positive within 2 days of start of admission but the article is very blustery about the non-common case that people test positive after discharge for some non-covid admission reason.
They say this in the article, so I'm not sure how it's "misleading". The point (which the article discusses) is that it's fairly unlikely that someone being admitted for severe Covid has not already had at least one positive test prior to admission.
But all of that is besides the point because the reported statistic wasn't even labelled or reported by the original source (the NHS) as "covid as cause of admission." The stat is labelled "covid positive admissions" which is not logically equivalent to "covid, as primary cause of admission" The article does mention this distinction but they've already led readers on by framing things and setting the scene for FUD/ suspicion toward public health institutions. Knowing how many patients that were admitted and were covid positive is a useful statistic to be tracking on it's own right without necessarily attributing the admissions to covid. I'd imagine the report that they plucked this single statistic from from is filled with lots of other data which may include numbers that more closely track attribution of the admission to covid. The article implies that bad decisions are being made on account of this single statistic, which is hard to believe or should be better supported in the article's reporting if that is the intended takeaway.
Also, consider the usage of the word "leaked" in the article and reconcile that with the statement "the leaked statistics come from NHS daily situation reports" I'm not even sure what they mean by leaked, do you? The NHS is not the GCHQ, their data isn't exactly classified top-secret. The entire article is written to leave readers with the impression that the wool is being pulled over their eyes by public health institutions. It plays into paranoia and distrust toward government and public institutions.