Is it around £45ish for a berth? Call scotrail telesales 08457 550033 see if they can advise whether there are seats or berths available.It will get you on seat only IF there are seats available.
Sunday night? All the londoners who work in scotland going north for Monday morning? Scottish people who've been visiting friends in London over the weekend going home?Is the seating coach busy? I assumed it would be dead but never used it. I'd be hoping for a double seat to myself to try and kip, what the odds?