Why Pietersen will add unfiltered challenge that England need - Finn

I was as surprised as most that Kevin Pietersen has joined the England coaching ranks as a mentor in the build-up to the 50-over World Cup in South Africa next autumn.

Not only was his last interaction with the England and Wales Cricket Board (ECB) sitting in the offices at Lord's being told he wouldn't play for England again in 2014, but the success of his YouTube channel, The Switch, and the time it takes to commit to something like that made it seem inconceivable that it could work.

However, when I took a step back to remember what it was like to share a dressing room with him at the beginning of my England career, I remembered a number of occasions that lead me to believe this can only be a good thing for all parties.

Kevin can be blunt and forthright, but dressing rooms need that in order to function properly. They can't be an echo chamber.

On the white-ball tour of India last year, while working for the host broadcaster, he was bemoaning the lack of practice, external that England's players had opted for in the build-up to games.

His practice was always intense and with purpose. Usually, he would come up to me as he was walking into the net and say he was going to smash me everywhere and not get out. That would usually rile me up to try to bowl quicker in order to not let him have it his way.

He wanted to make sure the practice had that bit more on it, something that is important when steeling your mind and reactions to go out and play at the highest level.

I used to enjoy the battles in the nets and it made me a better bowler by having competitive nets against one of the best players in the world.

We'd constantly be arguing about what angle the fielders were when he was deciding how many runs he'd scored off that ball, or whether I thought it could have gone to hand when he hit it in the air.

Kev was ahead of his time with both his mindset and skills. The inventor of the switch hit, and the most ardent supporter of the IPL before it became mainstream.

The flamingo flicks through mid-wicket in Test matches and hitting Glenn McGrath back over his head for six at Lord's in 2005.

None of which would look out of place now in 2026.

But, he never thought he'd cracked the game.

In 2012 when we were in Sri Lanka, I remember turning up for training at the SSC in Colombo to play a warm-up game and Kev had already been there for an hour facing local left-arm spin bowlers in order to try to correct his technique (ironically overseen by Andy Flower) that had been a problem for him intermittently.

As a result of that hard work he scored the most remarkable 151 against Rangana Herath in the second Test, hitting him to all parts, and backed it up later that year against India away to seal a historic red-ball series victory where his runs, particularly in Mumbai, formed the bedrock of the win.

Those runs and the manner with which they were scored, wouldn't have been possible without those long practice sessions while people weren't watching.

It wasn't just about him improving too. In Perth during the 2013-14 Ashes, when Mitchell Johnson and his moustache were running amok, it wouldn't be out of place to see a tailender looking shellshocked at the prospect of having to go and face him in the corner of the dressing room.

I vividly remember KP coming over to me (even though I wasn't in the starting XI), and saying 'let's go practice facing the short ball in the nets'. He threw bouncers at my head and helped me figure out a technique to be able to play (mainly evade) the short-pitched bowling.

I don't know whether at that stage of the tour he just wanted to be out of the dressing room rather than in it, but it helped me.

I can see him doing similar things with players he sees areas of improvement with in his role as mentor.

Kevin was never shy of letting the dressing room know his thoughts when debriefing a match, or when discussing the team's approach.

I saw this first hand with his dissent towards a fitness fielding session in the build-up to the 2014 Sydney Test match, among others.

Some may argue that bringing this into an environment that is clearly working and improving may be a bad thing.

However, I believe McCullum has learned from the way the Test team turned a corner as soon as everything seemed in order.

Pietersen comes from an era where there was no substitute for hard work and your main way of making a decent living from the game was by playing Test cricket - where you needed to work hard on a fundamental technique in order to firstly survive, but then to build and expand upon to be good at other formats.

The balance has clearly shifted now and the power lies with the players able to globetrot and play franchise tournaments.

In my eyes the 50-over format is now closer to the pace of modern Test cricket than T20 cricket, helping players with the fundamentals, married up with a strong work ethic can only be a good thing when looking to excel in the format, especially in conditions where there will be passages where the bowlers may be on top.

But, I believe he will bring this attitude to the dressing room for the next 14 months leading up to that World Cup.

There is no better time to introduce a voice of challenge than now, as it means that the team will not be able to simply maraud on as they have been without checks and balances.

Pietersen will provide this, unfiltered.