The former allrounder, who is recovering from a serious car accident suffered while filming for Top Gear last December, is working with the group in an unpaid capacity during the four-match series
Andrew Flintoff is working with England men during their one-day international series against New Zealand.
The 45-year-old accompanied the team during the opening match in Cardiff, having previously spent time with the Under-19s at the behest of close friend Rob Key, the England managing director.
Unpaid for the role and not expected to travel with the team to India for their 50-over World Cup defence starting next month, Flintoff is expected to remain with the group for the duration of the series.
"It's just great for him to be in around," said white-ball captain Jos Buttler. "He's obviously an England legend so it's just nice to have him around the group.
"He doesn't have any specific role, it's just having him around to observe a few of the lads and they can sort of pick his brains a little bit.
Flintoff positioned on the dressing room balcony in Cardiff (Clive Rose/Getty Images)
"It's great to have him with us."
One of the country's best-loved cricketers of the modern day and star of the 2005 Ashes series, Flintoff is currently recovering from suffering a number of serious injuries in a car accident last December.
He sustained facial injuries and broken ribs in the incident at Dunsfold Park Aerodrome in Surrey while filming Top Gear. Flintoff has since left the show.
Despite prioritising his media career in recent years - including Field of Dreams, the series during which Flintoff attempted to engage youngsters in Preston in cricket - the former Lancashire man has always harboured hopes of going into coaching.
He applied for the England men's head coach role in 2014, a position eventually given to Trevor Bayliss, and was later told the ECB thought the submission was someone joking around.
Flintoff was the central figure of England's historic 2005 Ashes success (Hamish Blair/Getty Images)
Speaking on The Graham Norton Show in 2020, he admitted to having a renewed enthusiasm for cricket since his retirement, his final game coming in 2015.
"In sport, you need to be selfish but I was selfish as a person – when we won I'd go out with the lads and celebrate, but when I lost, the family would get it when I would go home and sulk," said Flintoff, who suffered from depression during his playing career.
"I wouldn't speak and it would do me in for days and days.
"Looking back on my career all the games that stand out are the losses – I could tell you how I got out, but never how many runs I scored."
Welcome to www.thecricketer.com - the online home of the world’s oldest cricket magazine. Breaking news, interviews, opinion and cricket goodness from every corner of our beautiful sport, from village green to national arena.