“More recently he has shown what an impact he can have off the bench for us. He still has good leg speed and has an infectious energy.

“He is well-respected by both the staff and the players and has a wonderful way of enjoying his footy which rubs off on the whole group. He is a bloke I really enjoy coaching and I am looking forward to working with him again next season.”

Saints chairman Eamonn McManus said: “Louie is playing as well as ever and thoroughly deserves another year’s contract.

“He’s been a fantastic and popular club man over his 11 seasons with us. We are really looking forward to him continuing to be a key contributor to our continued success.”

McCarthy-Scarsbrook, who played 97 games for Harlequins prior to his Saints move, made his international debut for England in 2008 and represented Ireland in the 2017 World Cup.