Revellers in dinner jackets and ballgowns filled the streets of Oxford to party until dawn in the city's annual ritual.
Thousands flocked to Magdalen College, Oxford, to hear the choir sing hymns as the sun rose at 6am.
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Morris dancers and entertainers filled the streets this morning as the all-night celebrations continued.
Revellers enjoy the three-hour early morning festivities to mark May DayCredit: Reuters
A woman waves across the crowd during Oxford's May DayCredit: Reuters
A man in braces looks to be in high spirits amid dawn celebrations in OxfordCredit: Reuters
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Revellers in their dinner jackets look worse for wear as they wait for the sunrise in OxfordCredit: Reuters
A trio don their swimsuits to take part in the raucous ritual in St AndrewsCredit: Alamy
Some brave dippers bared all as they ran into the freezing water in the Scottish university town
A weary reveller is given a much-needed piggy back by a pal as they continue the celebrations in OxfordCredit: London News Pictures
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A dishevelled reveller looks in good spirits as the partying continues into the morning in OxfordCredit: London News Pictures
In past years Oxford students jumped into the river on May Day, but it was stopped after dozens were injured in 2005Credit: PA:Press Association Archive
A group of girls and a male friend jump for joy during celebrations at St AndrewsCredit: Alamy
A man holds his shirt as he wears just a dinner jacket after stripping off in OxfordCredit: London News Pictures
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May Day tradition sees students strip off and jump into the River Cherwell.
But the practice was stopped in 2005 after 40 students injured themselves jumping into 2ft of water.
The traditions date back 500 years and is attended by more than 25,000 people, who either get up at the crack of join to take part or stay up all night.
May Day has long been celebrated in Britain and dates back to the traditional pagan festival Beltane.
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Worshippers flocked to Glastonbury, Somerset, to celebrate the event with ancient customs such as dancing round a May pole.
A girl in a shirt and trainers dancers amid wild celebrations in OxfordCredit: London News Pictures
A man gives his friend a piggy back as they walk to this morning's May Day celebrations in OxfordCredit: London News Pictures
Two friends celebrate after completing the May Dip in St Andrews, fabled to bring good luck in examsCredit: Alamy
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Another pair of students look pretty cold as they take part in the mass skinny dipCredit: Alamy
Two girls are still smiling after dunking themselves in the freezing North SeaCredit: Alamy
A rowdy group of friends continue the festivities in the streets of Oxford at dawnCredit: London News Pictures
Party-goers cling to much-needed coffee as they power through to this morning's May Day celebrationsCredit: London News Pictures
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A reveller looks up to the sky as she waits for the sunrise during Oxford's May Day celebrationsCredit: London News Pictures
Morris dancers entertain the sleepy crowds as the sun rises above OxfordCredit: Alamy
A man blows smoke into the air as thousands gathered to welcome MayCredit: Reuters
A woman and baby wearing hawthorn sprigs on their hats join in the festivities in OxfordCredit: Alamy
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Dancers parade through historic Oxford's streets as thousands watch onCredit: Alamy
A group of musicians playing traditional instruments and adorned in green entertain crowds in OxfordCredit: Alamy
Dancers wearing all white with bells on their ankles perform for revellers outside Oxford's Hertford CollegeCredit: Alamy
Two performers channel nature with flowers in their hair and painted on their cheeksCredit: Alamy
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Three girls wrap up warm and carry a home-made sign welcoming the start of summer in OxfordCredit: Alamy
Revellers take part in a traditional May pole dance at Chalice Well, GlastonburyCredit: PA:Press Association
People in fancy dress in Glastonbury celebrate the pagan festival of BeltaneCredit: PA:Press Association
Dancers enjoy the sunshine at Chalice Well, GlastonburyCredit: PA:Press Association
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A man in fancy dress takes part in celebrations in GlastonburyCredit: PA:Press Association
A woman wears a flower headdress during May Day celebrations in GlastonburyCredit: PA:Press Association
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