Mahmood and Dart were both given extended sentences and will serve two-thirds of their prison terms rather than half, and will spend five years on licence.
Dart refused to stand when he was sentenced, saying: "I don't wish to stand up, I believe ruling and judging is only for Allah."
The judge said that they were all "committed fundamentalists" who would have been prepared to kill.
He told Dart and Mahmood:
I'm satisfied to the required criminal standard that neither of you had ruled out an attack in the United Kingdom, and that you, Mahmood, were looking at arming yourself with a bomb.
More top news
Rain will affect many northern areas at first, pushing further south through the day.
Train operating companies are failing to properly inform passengers about their rights, according to Which?
The average house price in a UK city has surged by nearly a third over the last five years, a shocking report has found.