Despite the decision, Tomkins says he has no regrets about his two seasons spent in New Zealand, where he scored 14 tries in his 37 games for the Warriors.
"I loved the experience. A big thing for me was just experiencing something new. I've been in my comfort zone in Wigan forever, never living more than a mile and a half from my parents and going to 12,000 miles away.
"To be able to experience a completely different culture and way of life was what I really wanted. I could see the beach from my bedroom and every morning I'd go for a coffee on the beach rather than inside Starbucks.
"I felt at home really early on, made loads of friends and we've kept our house in Auckland so I'd hope to move back one day. The rugby was a challenge as well, the team weren't top of the league like at Wigan and I wasn't playing my best all the time so I hope I've developed as a person," said Tomkins.
Tomkins is currently out of action until April due to a knee injury.