The government is seeking a High Court injunction to stop border staff from taking strike action on Thursday, the eve of the Olympic Games.
The 24-hour walkout is due to include immigration staff at Heathrow.
The Home Office said the government believed there was a 'procedural error' when Union memebers were balloted.
G4S should be the first outfit on a Government blacklist of high-risk firms that have failed to deliver, MPs have said.
Transport for London has created a new version of the tube map, to celebrate the success of Team GB at the London Olympics.
Olympic hero Mo Farah has shown off the newborn twins who inspired him to double gold-winning victory - and finally revealed their names.