More than one million tickets for the Olympic Games in London will not go on sale until Spring 2012.

The tickets, which include thousands for some of the most popular events, were held back from earlier sales while seating plans were being decided.

Organisers of the Games originally revealed that they would be available to purchase in December of this year, but that is now unlikely to be the case until April 2012.

A spokeswoman for the organising committee did confirm that tickets for the football will be sold as planned.

"In December, we will put 1.5 million Olympic football tickets on sale on a live system," she said.

"The remaining one million Olympic tickets, to all sports, will go on sale to the British public next year from the contingency seats, once venues are tested and licensed, and operational plans are completed."

The spokeswoman also confirmed that organisation's main focus is currently on the sale of Paralympic tickets.