Players like Steven Gerrard, Jack Wilshire and Rio Ferdinand are returning from injury, and Fabio Capello continues to identify young players who can follow in the footsteps of graduates like Joe Hart, Gary Cahill, Phil Jones, Chris Smalling and Phil Jones.
Terry said: “Clearly mistakes were made in South Africa and we will learn from them.
“But just because we feel we are getting things right on the pitch, it doesn’t mean we have a God-given right to think will just go to the Euros and win it.
“We have a lot of hard work ahead of us, but we are there now and we have a few games before next summer to really push on. What is encouraging is that we still haven’t got a fully fit squad so to go through qualifying undefeated is a good achievement.
“The other positive thing is that there will be young players out there who will believe they can really make a push for the squad over the course of the season."