Hartley has played all four Tests and is currently the leading wicket-taker in the series (20), having taken just 19 in the entirety of Lancashire's Division One campaign last summer. Bashir, who only made his first-class debut in 2023 and arrived with 10 dismissals at an average of 67 for Somerset, has more than doubled his red-ball tally with 12 Test wickets. Both picked up five-wicket hauls on this trip.

The concern, however, is the pair may be stunted by a lack of playing time when they return to their counties, which England want to avoid given they are building towards a tour of Pakistan in October.

"It will be a slight frustration of ours if they weren't given opportunities at county level," McCullum said. "There's a very real possibility that might be the case, but without wanting to dictate to counties because they have their own agendas as well, when you see performances like we have out of those two bowlers throughout the series, I think you'd be slightly mad if you didn't give them more opportunities in county cricket.

"It would be nice to think they'd get plenty of opportunities so that they can improve at a quicker rate. Whether those opportunities are with counties or with England, I think we've just got to keep trying to get cricket into them. Whatever opportunity we can, we'll try and give it to them because there's two guys there more than good enough for international cricket. They're also tough characters.

"What you can't tell from the outside of a man's body is the size of their heart - and we've seen both of them have big hearts and they're up for international cricket. It doesn't get any harder than it is right now, and they've both stood up and performed, so we've just to keep giving both of them chances."

"As much as England's about playing on good wickets and having the ball move off the seam, it should also be about playing on spinning wickets too," he said. "If we lived in a world where we could have both Bash and Leachy able to operate in spinning conditions at Somerset, and Hartley and Lyon could bowl together at Lancashire, I think that would be a great viewing point for spectators."

Despite looking beyond the numbers, McCullum insisted England's selection policies are not dismissive of county form. Indeed the scale and variety within English cricket has allowed them to be more precise with their picks.

"We certainly don't pick in spite of county cricket, if that's what you mean. We look at what we need skill-wise and we try and adjust it to what we think we're going to require, and be brave enough to make decisions around it. We're not going to get every decision right.

"From our point of view there's a big team out looking around county cricket, and the guys who we think play in the way we want to play as a cricket team, and who fit the environment as well. And there's a lot of eyes on those guys throughout. So it's not certainly in spite of it. County cricket is a good system, it's got a lot of cricketers opportunities, it's got a volume of cricket as well and different conditions.

"Some guys who have got great county numbers might not find themselves necessarily in the England team. And some guys who don't will find themselves in, but that's not a reflection of that [county cricket]. It's just about the skill set we want."