The 25-year-old left Swansea this summer to remain in the Premier League. And he hopes it gives him a chance to impress manager Gareth Southgate.
"The last time I spoke to (Southgate) I was at Swansea," Mawson said. "Realistically if you want to get back into (the squad) obviously the Premier League is a must.
"Which was always a positive coming here to a side that plays such exciting football. My first and foremost thing is to get into this side and I'm sure if I do well and I play well then Gareth will make a decision.
"I respect whatever decision he makes but I've had a taste for it (when being called up in March) and I would like to get the full thing.
"I'm not going to get picked for England if I'm not even in the starting XI for the Premier League side.
"That's the most important thing and whatever I can do on top of that, then fantastic. My main aim is to get into the side and cement my position."