The UK has seen its hottest day in April for nearly 70 years as the temperature hit 29.1°C (84°C) in St James's Park in London on Thursday.
In the Anglia region the thermometer peaked at more than 28°C (82°F) in Santon Downham on the Suffolk-Norfolk border at the edge of Thetford Forest.
The country has seen its hottest April day since it reached 29.4°C in London on 16 April 1949.
The unseasonably warm weather is set to continue into the weekend.
Maximum temperatures in the Anglia region on Thursday 19 April 2018
- 28.2°C in Santon Downham, Suffolk
- 27.4°C at Monks Wood near Sawtry, Cambridgeshire
- 27.2°C in Marham, Norfolk
- 27.1°C in Thurleigh near Bedford
- 27.1°C in Woburn, Bedfordshire
- 27.0°C in Writtle, Essex
- 26.9°C at Brooms Barn near Bury St Edmunds, Suffolk
- 26.9°C at Houghton Hall in Norfolk
- 26.8°C in Harpenden, Hertfordshire
- 26.7°C in Cambridge
- 26.6°C in Cavendish, Suffolk
- 26.3°C at Andrewsfield near Braintree, Essex
- 26.3°C in Northampton
- 26.3°C in Wittering, Cambridgeshire
- 25.9°C in Cromer, Norfolk
- 25.9°C in Holbeach, Lincolnshire
- 25.7°C in Wattisham, Suffolk
- 25.1°C in Stowe, Buckinghamshire
- 24.7°C in Weybourne, Norfolk
- 21.4°C in Shoeburyness, Essex
The highest April temperature ever recorded in the Anglia region was 28.9°C (84°F) in Cambridge on 20 April 1893.
The hot weather, which is a result of warm air moving up from the Azores in the south, is set to last into the weekend.
The London Marathon is forecast to be the hottest yet, with a high of 23°C (73°F) possible, beating the 1996 record of 22.7°C (72.9°F).
Met Office meteorologist Alex Burkill said: "It's going to be very hot and humid, and very close to, if not breaking the record."
Race organisers have announced they will add more water, ice and shower stations along the 26.2-mile route