Few had backed England to progress to the last eight, let alone finish ahead of France, but Hart says that was never a view shared by himself or his team-mates.
"Regardless of what some people thought, that was nothing to do with the camp. There has been a group of people who did not think we would do well but for anyone who knew the players it is not a surprise and it is part of the plan," he said.
"We're growing with each game. We started well with the right ideas and right game-plans and we've executed them well."
Hart was also keen to highlight the part played by the small, but vocal, following England have at the tournament and believes their presence has played a part in the team surpassing expectations.
Phil McNultyBBC Sport chief football writer
Joe Hart is as assured off the field as he is on it. When he faces the media the young England goalkeeper always has something interesting to say and gives the firm impression of someone confident in his work and confident in the company of his team-mates, whether it is at their base in Krakow or out on the field.
The Manchester City keeper is a mature individual who keeps the pressure of representing England at Euro 2012 in perspective while focusing firmly on his vitally important role. It is easy to see why he is such a key component of England's present and future.
He said: "For me, walking out against Ukraine and seeing the whole sea of yellow but seeing that one corner of England fans all singing together, it means so much. When you see England fans it means the world, we appreciate it is difficult for them to come out here but we appreciate it."
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