After working on the railway for 26 years and having safeguarded travel facilities I've never actually got round to travelling on the sleeper to Scotland. So I'm thinking of heading up to Glasgow on the Lowland Sleeper using my travel facilities but the thing that has always put me off is the thought of having to share a berth with a complete stranger. So I'm wondering how busy these trains get and what my chances are of getting a berth to myself? Or would it be better just to fill in one of my free travel boxes and paying for a First Class berth supplement to guarantee me a berth to myself? Any advice welcome.