lovezags

I am interested in doing the Princess transfer from Southhampton to LHR that has a stop at Windsor. It states that you can do this transfer if you have a 5pm or later flight. My flight departs at 4:50PM. I believe the arrival to LHR is around 1:45PM. Would that give me enough time for check in or should I not chance it? Otherwise, I wil be sitting in the airport all day. TIA