I would go with the medical angle but if there is an issue between the clubs it is likely to be about up front payment v instalments (sheer conjecture)
If we sell him with a sell-on then Celtic sell him with a sell on, we get a percentage of the fee Celtic get, do we get a percentage of the sell on after the third club sell him?
In fact up his wages with another 2 and a half year deal near Christmas, the boy is a Well fan, he will sign it and we are in a stronger position next year with a more experienced player. There are many options. No need to panic.
Why would he want to wrap himself up in all that Green and blue baggage when he will have other probably better options, only if he wanted to stay at home should he consider it and if he does then fir park for a year sounds good.
I am not bothered about Turnbull being left out this time but if he starts the new season as he ended this one (wherever he is) I would be surprised if he wasn’t drafted in for future squads.