Morrison said: “These next few games we play are all ‘must-wins’.
“We can either put a buffer there between ourselves and the teams below us, or you can end up getting leapfrogged if you get a couple of bad results close together.”
Thornton said: “Losing a player of Simon’s calibre is bound to cause us some problems.
“It’s going to stretch us for four games until we get him back, but these are the things you’ve got to deal with. You’ve got to bounce back and you can’t feel sorry for yourself.”
Thornton added: “Every game between now and the end of the season is going to have pressure on it, because we play all the teams in and around us.
“If we want to achieve our ambitions, then we’ve got to win games like this.”