Wilson continued, "We believe he will be a great addition to our squad and add important competition to our goalkeeping ranks as we prepare for the challenges ahead."
Lumley's experience is seen as a key asset, given his previous roles as a regular starter in the Championship with clubs like Reading, Middlesbrough, and QPR.
He is favored over Trueman and Maynard-Brewer, who have fewer senior appearances.
The competition among the three goalkeepers is expected to be competitive yet friendly.
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The club is likely to reveal its first-choice keeper in early season matches, including fixtures against Leyton Orient, Accrington Stanley, and Oldham Athletic, as well as a Carabao Cup match against Bolton.
