The Crystal Palace midfielder was frozen out by his former manager.
The 25-year-old was frozen out under Warnock and claims he was frustrated with the ex-Palace manager's tenure.
Indeed, Bannan says the 66-year-old refused to speak to him about his future, as well as not allowing the Scot to leave the club on loan - despite then not playing him at Crystal Palace.
“I was being kept here but I was not being kept here to play. It was frustrating," he said.
“He [Warnock] never really spoke to me. I went and spoke to him a couple of times to see if I could go out on loan and I was not allowed to. He said he needed me at the club but it did not look like he needed me because we were on a bad run and not once did I get a start."
Under the former Newcastle coach, Bannan says there is a key difference in that the manager prefers creative players, meaning he has given the midfielder the freedom to create chances.
“He wanted creative players with a risk factor. We have been lacking a cutting edge and he has given me the license to go and make things happen for the team."
Pardew completed his first signing as Palace boss yesterday, signing Arsenal striker Yaya Sanogo on loan until the end of the season. Next up for the Eagles is a crucial trip to Burnley this Saturday afternoon (3pm kick-off).