He was expected to sign on at McDiarmid Park yesterday, but, having just returned from his break late on Monday night, decided it was best to travel to Perth today to sign.

His signature brings the Perth club’s close- season signing tally to five.

Kevin Rutkiewicz from Aberdeen, Lee Hardy from Ayr, and Sean Webb and David Hannah from Ross County have also become new Saints.

Saints team boss John Connolly said there are unlikely to be any more additions to the squad this week, although he is striving to bring more players to the club prior to the season’s start.

Speaking after Marshall had signed today, John said, “Colin is a young lad with a lot of potential.

“He’s lightning quick and can net about seven-10 goals next season for us from the middle of the park.

“He had a good season at Clyde and I intend playing him in a wide midfield role.”