But Chambers cited a heavy schedule following the cup final in Florence as he put his name forward only for the sprint relay.

BBC: Chambers opts out of 100m

Veteran Donna Fraser revealed the 400m final had been "very tough" as she trailed in sixth place but has the Sunday's relay event to look forward to.

BBC: Farah cruises home to 3,000m gold

According to Western intelligence officials quoted in the reports, Humam al-Balawi called his handlers last week to arrange a meeting at Forward Operating Base Chapman in Khost, where he said he would relay urgent information about Zawahiri.

BBC: CIA logo

Going forward, the LLCD will play a vital part in NASA's 2017 Laser Communications Relay Demonstration, a key test of laser-based relay comms in future missions.

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