Forrester - released by Aston Villa in 2011 - insisted he knew nothing of the visit but admitted he was still dreaming of playing in the Premier League.
"You've got to believe," he said. "Obviously, it's everyone's dream to play in the Premier League and I've come down the leagues to learn my trade, and I'm doing that.
"I've got a great manager behind me, great colleagues and a great club.
"I'm at a hungry club that wants success and I'm not somewhere where mediocre is accepted.
"So it's bringing me on as a player and I'm really grateful for that."