"I pretty much decided last Sunday," Cook said in an interview with the Mail on Sunday. "I woke up and immediately started thinking about trying to win the Ashes 4-1 and then about what we will have to do to win against Pakistan. It came quickly to me to start planning ahead and that told me that I probably wanted to carry on a bit longer.
"It absolutely has been on my mind. At the start of this summer I didn't know what was going to happen and I wasn't sure if I would continue beyond the Ashes. But while you've still got the opportunity to be England captain and you've still got more to give, which I now feel I have, then you need to carry on and give it your all."
"It absolutely has been on my mind. At the start of this summer I didn't know what was going to happen and I wasn't sure if I would continue beyond the Ashes. But while you've still got the opportunity to be England captain and you've still got more to give, which I now feel I have, then you need to carry on and give it your all."