The Olympic rings were unveiled at Tower Bridge this morning to mark one month to go until the London 2012 Games begin.
Hundreds of workers employed on London's bike hire service are set to receive a £500 bonus for working during the Olympics.
The Community union said its 220 members on the so-called Boris Bike scheme - named after the capital's Mayor Boris Johnson - will also get improved overtime payments in recognition of their increased workload during the Games.
The deal, the latest in a string of Olympic bonus deals for transport workers, will be put to Community's members over the next few days.
Half of firms in London will let their employees work from home during the Olympics or take time off to watch the Games, according to a study by the CBI.
A survey of more than 250 companies in the capital by the CBI showed that most were positive about the event, believing it will boost tourism.
Sara Parker, CBI London director said:
The 2012 Games will help showcase London around the world and will be good for the economy.
But with only a month to go, the scale of the challenge is becoming clear and some businesses are still nervous about their levels of preparedness. That's why it's crucial that all companies ensure they plan ahead, particularly for the transport and logistical challenges.
Prime Minister David Cameron was heckled by on the of London 2012 'Games Maker' volunteers during a speech thanking them for their contribution.
Mr Cameron was told he should be "ashamed of himself" just 22 seconds into his speech. The protester said:
"Shame on you, David Cameron, you are crippling the poor in London. Shame on you..."
The man tried to continue to speak but his words were drowned out by the other volunteers.
A London 2012 spokesman said:
"People are allowed their political views. It was just a rather inappropriate place and time to air them."
No further information was given on the volunteer but London 2012 said he would continue in his role.
Mr Cameron told around 200 'Games Makers' who have signed up to help out during the Olympic Games that they were "not just part of the Games" but what will make the Games a success. He said:
You will not just be part of the Games. You will be what makes the Games a success.
The people who come to the Games, the visitors, the athletes, the foreign leaders, what you do will make a real difference between a successful Games and an absolutely fantastically successful Games.
One of the best bits of legacy we can give our country is the inspiration that all of you provide by volunteering to take part in the Games in the first place.
I think people will look at your example and think 'What more can I do to help build a stronger society and a stronger country?'.
Prime Minister David Cameron thanked volunteer 'Games Makers' for donating their time to the London 2012 Olympic Games, due to start in a month. There are 70,000 Games Makers who have been signed up to work.
Mr Cameron said:
"Coming here today and seeing what you are doing really brings it home to me what an enormous amount you are giving up to be part of these Games. These Games could not exist without you, so a really big thank you."