At Romney locos are exchanged, presumably to give driver and loco a break in what is a very demanding timetable. The line is fully signalled, and about 60% of the length is double-track.
The coaches are somewhat cramped, but otherwise comfortable, just as well on a 3-hour round trip! Trains are very long - up to 14 coaches - so even though the line is relatively flat, those locos have a job to do.
The line cuts through the caravan park we stayed at, with a handy station!
I think someone misunderstood the term "skip wagon".