It’s reported in the Shields Gazette that Newcastle have a 40 per cent sell on from when they sold him and this still applies.
Newcastle United 'pushing ahead' with plans to seal £16m deal for former academy star
This hopefully will make us keener to keep him as cashing in is less attractive.
If this was the case, they wouldn't get 40% of the transfer fee. Just 40% of anything Peterborough receive haivng agreed a separate sell-on with us.