Temperatures skyrocketed on Sunday as millions of Brits flocked to the seaside to enjoy what looked set to become the hottest day of the year so far.
A high of 25C (77F) was forecast for the south east of the country, which would eclipse 2017’s record thus far of 22.1C (72F).
After a sunshine-filled day and cloudless skies for most on Saturday, fortunes changed in some parts as the weather returned to normal for spring.
There was a north-west, south-east split though, as conditions cooled for Scotland and Northern Ireland ― before other parts were forecast to see a dramatic 10-degree drop on Monday.
All-change from Monday
Met Office weather forecaster Emma Boorman told the Press Association: “From Monday onwards it’s really all-change.
“The rain and cloud across the far north west is associated with a cold front.
“That will be making its way to the south east during Sunday night and introducing a much colder feel as we head into the start of the new working week.
“Temperatures in some places, for example, could be a solid 10 degrees cooler on Monday than they were on Sunday.”
Yet the miserable twist in the tale did nothing to dissuade sun seekers on Sunday, as these pictures prove beyond doubt.
Tap and swipe to view pictures from Sunday below.
Charlie Crowhurst via Getty Images
This couple came prepared for the sweltering heat in Brighton
Charlie Crowhurst via Getty Images
And they were snapped taking precautions
Charlie Crowhurst via Getty Images
Children throw stones into the wash at Brighton beach on Sunday
Peter Nicholls / Reuters
Visitors to St. James's park in London enjoy the sunshine and warm temperatures
Charlie Crowhurst via Getty Images
Bathers flocked the famous pebbled beach on England's south coast
BEN STANSALL via Getty Images
Sun seekers gained the best spots in a busy St James's Park, London
Peter Nicholls / Reuters
While others sought quieter locations for relaxation
Charlie Crowhurst via Getty Images
A couple curl up on a towel as temperatures soared to 25c
Charlie Crowhurst via Getty Images
This picture from Brighton looks like a Mediterranean scene
Charlie Crowhurst via Getty Images
A man tucks into a 99 ice cream on Brighton beach
GLYN KIRK via Getty Images
People sit on the beach as they enjoy the weather conditions alongside Brighton Pier on the south coast of England
GLYN KIRK via Getty Images
A Union flag flies as people enjoy the scorching weather
Jason Cairnduff / Reuters
A cute dog enjoys the heat and carries a tennis ball in its mouth in Marbury Park, Northwich
Jason Cairnduff / Reuters
A mute swan lands at sunrise on Sunday at Marbury Park
Jason Cairnduff / Reuters
GLYN KIRK via Getty Images
Jetski riders enjoy the hot weather they play on the sea by the side of Brighton Pier
BEN STANSALL via Getty Images
People paint in the sunshine in Greenwich Park, south London
GLYN KIRK via Getty Images
A woman practices her hooping skills in the sun on Brighton seafront
BEN STANSALL via Getty Images
A man sunbaths in St James's Park