According to reports, Henderson was offered contracts from various European teams, but he chose to return to the Premier League. His decision is partly due to his ambition to stay in front of the England national team's coaches, especially ahead of the 2026 World Cup.
It's worth noting that Henderson got a recall to the England national team towards the end of last season, thanks to the efforts of his current coach, Thomas Tuchel.
Before joining Ajax, Henderson played for Al-Ettifaq and Liverpool. He also had a stint with Sunderland earlier in his career. His move to Brentford will likely offset the loss of Christian Norgaard, who recently joined Arsenal.