Sleeper ticket to Glasgow departing Wed 7 Nov

Hi all, I have a sleeper berth ticket to Glasgow departing Euston this Wednesday night (7 Nov) at 23.50pm and arriving into Glasgow Central the following morning at 7.20am. It's the lower bunk in a twin berth. I have to travel up earlier that day so unfortunately can no longer use it. Only women can take it because they put you in a berth with someone of the same gender. Just looking to recoup the cost (£29).