The through sleepers were First Class Only, but the bulk of the demand was Standard Class, for whom parallel arrangements were seated trains or portions on both sides, and walking on/off the ship. There was a comparable overnight London-Paris normal seated service via Newhaven-Dieppe.
I remember reading a contemporary article which described different procedures on the French side, that passengers handed their passports to the sleeping car attendant, and they were returned in the morning, having been checked along the way, hence no arrival checks at Paris. This sort of fits in with the old French way where you had to leave your passports at the front desk of any hotel on the first night, at about 3am the night porter had to take them down to the local gendarmerie to be registered. All the hotel night porters all arrived at the same time, and there was a rota for who brought along a bottle of wine from the hotel stocks which was shared and toasted by all, including, of course, the night gendarmeIf I remember correctly we had two staff to check the arriving passengers passports in the morning, and one for the departing passengers at night
I believe so too, as the train was steam heated from the locomotive on each side, but there was no steam connection for the several hours that it was on the ship (a bit surprising, as the contemporary ships were steam turbine powered). I presume ETH was fitted when electric locos began, on both sides, around 1960.I think there were coke fired furnaces in each carriage to provide heating (would that be right?),