Gateshead-born left-back Hayden was a member of Boro’s double-winning U18s side in 2014/15 and was rewarded with his first call-up for England U19s.
Hayden, who joined our Academy at U13 level, had previously won caps for England U16s and U17s.
He spent the first half of the 2018/19 campaign on loan at Scottish Premier League St Mirren, scoring his first-ever career goal in a 6-0 win over Dumbarton in the Scottish League Cup. He made 11 appearances for the Paisley-based side who changed manager early in the campaign.
Hayden returned to us, then linked up with League Two Cambridge United in January 2019 on loan for the rest of the season, making 14 appearances for the U's.