WHBM,The Trident1 and 2 did have rear facing seats in the rear cabin and pullman seats in the front cabin this also included the Trident 3 as well,ill try and find a pic for all to see,here is the rear cabin of the 2E:
Trident 3B rear cabin:
and here are the pullman seats,these were located in the front of the forward cabin and the front of the rear cabin (pic)