The torch relay will set off from Nottingham Castle the following morning.

BBC: Olympic torch relay to stop in Nottingham

France's Amaury Leveaux set a new world record in the 50m freestyle with a mark of 20.48, while Italy's men's relay team set a new world best of 1:32.91 in the 4x50m medley.

BBC: Goddard claims gold for Britain

Unlike a smartphone, a watch is always in direct contact with the skin, which means it can relay a unique set of data on body functions.

FORBES: On Second Thought, Maybe That Apple iWatch Will Be A Timely Product After All

The units, dubbed "Churchill's Secret Army", were set up to relay vital information about enemy movements and help mount counter-attacks as Britain braced itself for occupation.

BBC: Secret wartime bunker near Cardiff opened to public

Bolt's showdown with American Tyson Gay, who is running in the sprint relay in London on Saturday, is set to be one of the highlights.

CNN: Athletics: Bolt eases to 100m win in London

This year more than 500 people from 41 countries are taking part in the 40, 000-mile relay race, which started in August 2011 and is set to finish later this month.

CNN: July 12, 2012 -- Updated 1330 GMT (2130 HKT)

In the collegiate scene, we're able to deal with that pretty effectively because we have a common set of athletes running in certain positions on the relay.

NPR: Anchor-Leg Strength May Be Hurting Relay Handoffs

Great Britain's men made it through the heats of the 4x100m relay as Simeon Williamson, Tyrone Edgar, Marlon Devonish and Harry Aikines-Aryeetey set the second best time of 38.11.

BBC: Dobriskey through to 1500m final