Cheltenham have brought in three promising youngsters from higher division sides on loan deals.
The League One Robins have signed Arsenal forward Nathan Butler-Oyedeji and Birmingham right-back Josh Williams, both 20.
West Brom forward Jovan Malcolm, 21, has joined on a season-long loan but was not registered in time to feature in Saturday's game against Barnsley.
Butler-Oyedeji has twice been on the bench for Arsenal's first team.
He finished last season on loan at Accrington while Williams has made six starts for the Blues in the Championship.
Campbell made his Championship debut last season and also had a loan at Accrington, playing 13 times in 2021-22.
Butler-Oyedeji - who joins on a season-long deal - scored four goals for the Gunners under-21s in the EFL Trophy last season and was an unused substitute in both the Premier League and FA Cup.
He told the club website: "I am looking forward to the challenge. I was with Accrington last season - coming from Arsenal it was a big culture shock, but one that I think every player needs. I'm fast with an eye for goal and like to make things happen."
Williams' loan is only until January as Cheltenham went into the market after an injury to loan signing from Fulham, Luciano D'Auria-Henry.
They have also loaned Oli Hammond from Nottingham Forest, Owen Bevan from Bournemouth, and Brighton's Cameron Peupion.
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