number one

In a statement the school apologised "for any inconvenience caused by this external issue, but safeguarding our children is our number one priority".

If fully cleared by regulators, NexGen’s project alone could push Canada to become the world’s largest producer of uranium over the coming decade, knocking Kazakhstan out of the number one spot.

All versions of the song reached number one in the UK singles chart.

"No world leader is arriving with climate change at the number one spot in their inbox," Prof Thomas Hale at Oxford university explains.

Since then, they've scored 22 top 10 hits in the UK, including four number ones, and have just released a cover of the David Bowie/Mott The Hoople classic All The Young Dudes.