But Banton, opening after Jason Roy was ruled out with a side injury, at least had a night to remember after being dropped on five when Iftikhar Ahmed floored a routine slip catch off unfortunate paceman Shaheen Afridi.
“It was good fun,” Banton told Sky Sports. “I struggled to begin with, they bowled quite nicely and then I just backed myself when the spinners came on. There was a small boundary on one side.”
Pakistan struck five balls after captain Babar Azam won the toss when left-arm spinner Imad Wasim caught and bowled Jonny Bairstow.
But Banton took charge with two slog-swept sixes off consecutive balls from leg-spinner Shadab Khan. He went on to complete a 33-ball fifty featuring three fours and three sixes before scooping paceman Haris Rauf for an audacious six over fine leg only to slice Imad to extra-cover.
England captain Eoin Morgan was then lbw to Iftikhar Ahmed before Moeen Ali was well caught by Mohammad Rizwan off Shadab.
Wicketkeeper Rizwan, who impressed during Pakistan’s recent 1-0 Test series defeat by England, then stumped Lewis Gregory off Imad, who took 2-31 from his maximum four overs.
The second fixture in this three-match series takes place at Old Trafford on Sunday.