Barely a year ago, Jenkinson was playing in the Conference.
He told Arsenal Player: "Playing with the sort of players I train with every day just brings you on naturally. You're always going to get better. I feel that technically I have improved quite a lot and you get a lot of time with Tony Colbert and Marcus Svensson, the two fitness coaches. My stamina and fitness was always a good part of my game but I think I've even built on that now as well.
"I feel fitter and stronger and I think I am improving. I know I have a lot more to improve but I feel I am doing that. I feel like I've come on but I know there's a lot more for people to see of me and I know there's a lot more I can get out of myself as well."