The talks have been held on and off for many years.
Further talks were held between 11 and 17 April 2008.
The two sides could not agree on where the talks should be held.
No agreement on when the next talks will be held, though March 2006 looked likely at the time.
The site is so secret that even some members of the union did not know where the talks were being held.
The two will hold talks on a new national contract next year.
He is due to hold talks with his wife on Friday.
He said the Government wanted to "hold talks from a position of strength."
Officials did not disclose where the talks would be held.
The government and the rebels have not held talks since 1995.