In May, when Stokes backed Pope following the one-off Test against Zimbabwe, the captain said there was an “agenda” against his then deputy.
Pope made a century in the first innings of the first Test against India in June, but passed 50 only once more in the five-match series.
Bethell, 21, played only one first-class match in the run-up to coming into the England team for the final Test at The Oval and struggled as a result, but the left-hander then made his first professional century in a one-day international against South Africa earlier this month.
“We’ll see a bit more of Jacob Bethell playing in white-ball cricket before the Ashes,” said former Kent and England batter Key. “We know a fair amount about Ollie Pope, but Jacob Bethell will continue to get experience.”
Talismanic captain Stokes missed the final Test against India with a shoulder injury, meaning the all-rounder has not completed any of England’s past four Test series.
However, the 34-year-old stepped up his return by bowling during intervals of his county Durham’s County Championship match against Yorkshire at Headingley on Wednesday.
“He won’t have a lot of cricket before the Ashes series, but that didn’t stop him against India,” said Key. “With the ball, it’s certainly the best I’ve seen him bowl for a long time, if not ever, and that was without playing a lot of cricket going into the summer.
“I have no issues with Ben Stokes at all. He’s generally the type of player that builds and everything he does gets himself ready for these big moments.”
Stokes’ Durham team-mate Wood has not played a Test since August 2024 because of elbow and knee injuries, but Key is “confident” the world’s fastest bowler will be fit for the first Ashes Test on 21 November.
“His recovery is probably a little bit slower than we thought but we’re always erring on the side of caution,” said Key.
“The thing Woody always has going for him is he’s never been someone that needs to play lots and lots of games to get into form. He’s someone that can bowl in nets, bowl in middle practice, then all of a sudden he runs up and bowls 95mph.”
Surrey all-rounder Jacks was chosen as the back-up spinner to Shoaib Bashir, ahead of Rehan Ahmed, Jack Leach and Liam Dawson.
Off-spinner Jacks has taken only five first-class wickets this year but, like Bashir, offers England height, as well as the option to boost their batting.
“In what we have coming up, we think Jacks offers a lot of different options,” said Key.
Key also confirmed leg-spinner Ahmed will be named in the England Lions squad that will be in Australia the same time as the senior group, so could be called into the Test party if required.