Not really January window but Coulson signs contract extension with Middlesbrough.
https://www.mfc.co.uk/news/2023/february/06/hayden-coulson-pens-new-deal/?fbclid=IwAR1fjHJe14GT6cngiMpFe-foNZo13ODMvGmsXSKTGMsYfLWD2B76T5-R7KY
This summer there should be no loans unless there is an option to buy. Fuck developing other teams players.
ETA - Not that I would have signed Coulson as a left back anyway.