Britain may have to call up more soldiers to guard the Olympic Games after a failed private sector recruitment drive left an embarrassing hole in security.

The security fiasco and doubts over the ability of London's transport system to handle large numbers of visitors to the Games have overshadowed an event that the government still hopes will give recession-hit Britain something to celebrate.

The omens did not look good as athletes from across the world arrived in London this week, some tweeting frustration with transport delays amid a media storm over security fears.

Passengers arriving for the Games could also face long waits in line and chaotic delays after a union representing passport officials said its members had voted to back a strike.

And, after months of rain and floods, the Games has already earned the nickname of the Soggy Olympics in the British press.

"There are challenges and the military have stepped up to the plate and I salute them for it," Prime Minister David Cameron said during a visit to Afghanistan. "Let's not call it a soggy Olympics, let's call it a great Olympics."

The glitch came after security firm G4S said it could not provide a promised 10,400 security guards to watch over the Games venues, exposing the government to accusations of poor planning.

To fill the gap, the defense ministry called up an extra 3,500 troops - many just back from serving in Afghanistan - to take the armed forces contribution to 17,000 personnel.

More soldiers could now be deployed to control crowds at the Games if G4S struggles to find a minimum requirement of 7,000 staff. An extra 2,000 may be needed.

Defense Secretary Philip Hammond said more soldiers would be deployed if needed.

"If there is a requirement for more military support, it will be provided," he said.

Britain is keen to soothe security fears in a city where suicide bombers killed 52 people in attacks on the transport system the day after London was awarded the Games, in July 2005.

The latest victim of London's roads and rail network was the July 27 opening ceremony, due to be held in the evening, which has been trimmed to avoid a possible late-night stampede for trains and buses home, officials said.

(China Daily 07/20/2012 page22)