Buuuulshiiiiit! Wanna bet? Existing record is 35.6c set in Southampton in 1976. About 96f. If it hits 34c anywhere, this will be the third June in six that 34c has been reached, but overall, temperatures in low-mid 30's occur in UK summers every year. So nothing really to see here. The notable events occur when you get a week/weeks/month of temperatures where somewhere is 30+ every day. Like 2019? when 6 consecutive July days reached or exceeded 34c, including the Cambridge UK record of 38.7c.
We suffer from press imbecility in the UK where weather is concerned. The Met Office say Friday will be the hottest day of the year thus far, 32-33c, hardly unusual for June. Then the Chinese whispers begin and this becomes 33-34c, then someone else adds another 1c onto it, resulting in in bollocks like 36c being cited. It won't be. If it is, please come back to this thread with humilating abuse towards me and I will post a suitably embarrassed reply.
To compound the imbecility, we see headlines in this situation like 'London to be hotter than Athens/Algarve/Madrid/****/****' (fill as appropriate with city or location you've spotted that has a predicted temperature 1c or more lower than the London or UK forecast.)
I wouldn't mind so much if the reverse was true, so on the other 355 days of the year, daily, we would get an equally meaningless headline in the papers screaming 'MALAGA TO BE HOTTER THAN MANCHESTER TODAY!
P.S. This crescendo of 90f-plus 'heat' will last ONE day, with the inevitable 'thundery breakdown' the following day. The we can get back to vital
stories about BJ's missus or Kevin Spacey's wandering hands etc.