Iain is correct to emphasise that the data is provisional. You would expect any robust system to include a percentage of sites being audited throughout the year to pick up any defective weather stations. Where those are detected the only sound response is to exclude that reporting site for every year since it was last audited. Not to extrapolate based on previous years.
To take one manual station (not) at random: the station at Faversham, which recorded the highest ever daytime temperature not all that many years ago, is on what I believe is Crown Estate land at Brogdale. The site used to be operated by the Ministry of Agriculture (under various brands) but has been run by a charity for the last fifteen years.
So: back in the day there would have been at least a few state employees around to report regular, if not daily, recordings. I wonder what resources are available for this these days, especially out-of-season?
(The official Met Office weather station is in the white box)
I wouldn’t want to draw any firm conclusions based on this sample of one…but with the steady sell-off of public assets over many years, the general deskilling and fragmentation of many jobs, and other such factors I would be surprised if readings were as reliable as they used to be or audited as often. I doubt there are many (any?) reporters who care enough to keep their own log of figures. I am guessing that many of the manual recordings are sent in using a password-protected web portal.
Just a few random thoughts. I’m familiar, of course, with arguments about greater population densities and reflected heat from brick, tarmac etc which may distort readings. The Brogdale weather station is now being steadily encroached upon by new estates of poky semi-detached houses, a Premier Inn, Lidl, new roads etc.
In short I share Iain’s scepticism about some aspects of the figures and, in particular, the Met Office’s keenness to share them so early in the year. Will they publish the final (more accurately, the less provisional/audited results) when they are available?
None of which disproves the ‘climate crisis’ hypothesis but really it is a “we are too many” crisis.