Britons basked in the warmest day of the year so far, with temperatures higher than the Balearics and Malta.
Many flocked to parks and beaches as the mercury rose to a top temperature of 24.5C (76.1F) in St James' Park in central London, compared to high teens in the Mediterranean holiday islands.
It means that this May could still be on track to become the hottest ever, with bookmakers Ladbrokes slashing odds to 5/1 that the record set 60 years ago when temperatures got to 32.8C (91.04F) will be beaten.
More top news
Talks at Stormont aimed at restoring power-sharing have adjourned with little sign of the DUP and Sinn Fein reaching an agreement.
On Wednesday, the rain will roll northwards - a few hours of solid rain in the east and over the Pennines.
Jeremy Corbyn has challenged Theresa May to better fund the police and fire services by backing a Labour amendment to the Queen's Speech.