BBC News

The knight, who won the Kentucky Derby Award and was suspended for using the ride crop a lot during the race.
Officials said the beginners Alvarado struck the three -year -old Coult, who won the crown, eight times during the race.
The regulations say that the contestant may hit the horse six times with a crop.
Alvarado was fined 62,000 dollars (4,6600 pounds) and was suspended for two days racing in Churchill Downs by the Safety Safety Authority.
The fine is usually 10 % of the knight's profits, which amounted to $ 31,000 of the $ 310,000 prize – but because it was his second crime, the fine was doubled, according to the rules.
Sovereignty won the favorite press to win 151 Kentucky Derby on May 3.
This was the first Derby crown in Alvarado, and the first for the owner of sovereignty, Sheikh Mohammed bin Rashid Al Maktoum. The horse was trained by veteran William Mout.