Greenwich Mean Time

Before time became standardised, different areas of the country all kept their own 'local time'. This gold traveller's watch with two minute hands shows how tricky that could be

Discover the story behind the media sensation Ruth Belville, who brought the correct time from the Royal Observatory to London for almost 50 years.

How did local clock time in Greenwich change the world?

How do you know that your watch, clock or phone is telling exactly the right time? At one time, the only way was to look to the roof of the Observatory.

Why does UK time change, and when was British Summer Time first introduced? Explore the history of BST and daylight saving