The LDA aims to reach voluntary agreements with businesses

The protesters from Marshgate Lane, in Stratford, at the heart of the Olympic development plans in east London, say they face being forced to move.

They also fear they will not get a fair price for their land.

Mayor Ken Livingstone said the London Development Agency (LDA) would try to reach voluntary agreements with firms.

Banners saying "Olympic 2012 killing local businesses" and "Ken: good sports people play fair" were held aloft by protesters.

What we can't do is pay people six or seven times what their land is worth with public money Neil Coleman, the Mayor's policy adviser

Among them was Mike Finlay, of PA Finlay, one of about 350 Marshgate businesses likely to be affected.

He told BBC News the Games meant the company would be moved to inferior premises.

"That relocation would cost my company �600,000 - that is not fair."

But Neil Coleman, the Mayor's policy adviser, said Mr Livingstone had insisted everyone should get full market value and be compensated for any loss of profits.

"What we can't do is pay people six or seven times what their land is worth with public money," he said.

Mary Reilly, chairman of the London Development Agency, said: "We have been in touch with all the businesses. Twenty-four have signed up.

"It is our intention to negotiate with everybody and we would like to reach private agreements with them all."