That article looks like its referring to a certain subset of the "advisors" who might well be saying that- e.g. Susan Michie (Communist party member, demanded hospitality remain closed last summer, wants nurseries and construction sites closed immediately to tighten lockdown
) and a couple of her supporters on SAGE who have piped up recently, also people like Devi Sridhar
. Even Whitty - who I am not a fan of - recently said the government has to accept an element of risk to reopen society -he isn't a Zero COVID fanatic by any means. Several press sources recently say that Neil Ferguson is viewed as a lockdown fanatic too and what he says is not taken at face value by the cabinet.
If cases and hospitalisations and deaths are dropping fast there is 0% chance keeping hospitality closed until May will be politically possible for Johnson, the only thing that would allow that would be something extremely unlikely eg vaccines don't work as expected. Much as I loathe Johnson he won't support keeping things closed longer than needed. Keir Starmer is also astute and a pragmatist - he won't listen to the insane Corbynistas who are demanding a zero COVID approach.
If Johnson did try and do that there would be a leadership challenge which he would lose. Sunak the favourite by far, Gove seen as treacherous and far to much of a lockdown fan by the CRG/ERG lot.
Much as I hate the Conservative party, as a "centrist" Labour member, the CRG will be useful here and will stop restrictions from rolling on too long. The dire economic, social and NHS waiting list consequences of all this will also be coming apparent.