Take a look through our gallery to see when contracts are due to run until...
1. Goalkeeper: Jak Alnwick
On loan from Rangers until the end of season
2. Goalkeeper: Myles Boney
Contract runs until summer 2021 with option to extend by 12 months
3. Goalkeeper: Mark Howard
Contract expires at the end of the season.
4. Goalkeeper: Christoffer Mafoumbi
Contract expires at the end of the season.
5. Goalkeeper: Jack Sims
Contract runs until summer 2021 with option to extend by 12 months.
6. Defender: Nick Anderton
Contract expires at the end of the season.