League One and Two LIVE: Celtic weigh up swap deal for Sunderland star while West Ham United eye double L1 swoop

Sunderland manager Jack Ross
Sunderland manager Jack Ross

It's Day 16 of the January window - meaning League One and Two clubs are at the halfway point in their transfer business.

Stay tuned throughout the day for all the latest news and breaking transfer speculation from across the two divisions. Don't forget to refresh.