In pictures: Oxford's May Morning

http://www.bbc.co.uk/news/uk-england-oxfordshire-39769904

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A record-breaking 27,000 people have descended on Oxford for its annual spring celebration.

The May Morning festival, whose origins are unclear, has been a tradition for more than 500 years.

It began with crowds listening to the Magdalen College Choir serenade the congregation from Magdalen Tower at daybreak.

The bells were then rung - the movement of which typically makes the tower sway up to 4in (10cm).