Players with twelve months on their contract can't (although I know it goes on clandestinely). Still can't go on a free with twelve months left on their contract though.
Fact is, Bissouma is a Brighton player for the next two seasons, unless we say so.
Nope, but could threat their way out very cheapily. In a year he could say "either you sell me very cheap or I walk for free by the end of the season".
But you are right, he is a Brighton player until Tony says he isnt sometime this summer.