Michael Vaughan says England will aim for World Cup glory in 2007 after their Ashes triumph over Australia.
Vaughan says England's one-day team has yet to click properly
The one-day team has not performed as well as the Test side and Vaughan said this was the next big challenge.
The England captain said: "The one-day team is a little bit below the Test team at the minute but we are building for 2007 and the World Cup."
Vaughan said the players had a lot of self-belief after losing the first Ashes Test and going on to win 2-1.
He added: "A lot of people laughed at claims England could win the Ashes this summer and after we lost the first Test basically people were writing us off.
"As a team and players, we had a lot of self-belief that we could turn things around, and we also have a lot of self-belief we can do very well in the World Cup come 2007 - that is when we will be judged."
England's one-day side were beaten by Australia in the NatWest Challenge earlier in the summer and lost in the final of the ICC Champions Trophy on home soil last September.
The 2007 World Cup is being held in the West Indies with Australia the defending champions.