That would make it the hottest overall early May bank holiday weekend, smashing the previous record in 1995 when temperatures peaked on the Saturday at 28.6C.
TEMPERATURES soared to more than 22C in parts of the North-East as people rounded off their three-day weekend - making it the hottest Bank Holiday Monday in 40 years.
Nearly all of the United Kingdom is basking in a heatwave that fell perfectly in line with the first May Bank Holiday, but temperatures in London and the south east are set to reach scorchio heights.
The weather is set to become mixed as the month continues.
A forecast on the Met Office website reads: "Bank Holiday Monday promises to be another very warm day, with plenty of sunshine".
He added: "Edinburgh should therefore see another lovely day, while we believe some fog could affect the south west coast, near Stranraer".
"So it doesn't look like it's going to carry on in a similar kind of vein to high pressure in charge, sunshine, light winds, high temperatures, that we have now", he said.
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Temperatures may be initially below normal, but will recover to close to average.
"Neither does it look like it's going to be a complete washout, terrible end to the month of May".
Just before midday, BBC weather said the record for the hottest early Bank Holiday Monday had been beaten.
"If we see things really warm up it's likely to mean millions more cars on the road, which is bound to cause queues on popular routes".
"That's going to be the exception rather than the rule. I think for most places, if you take the bulk of England and Wales for examples, we're looking at somewhere around the low to mid 20s mark", he said.
Southern said disruption is expected until the end of the day.
"The second record would be that of "hottest ever Spring bank holiday weekend" and this one might be a little harder to achieve".