I noticed this pointer to the e-book (.pdf) I made on CIWL cars, including the F(erry) type sleeping cars. The newest version of this book can always be seen and/or downloaded (for free, i.e. at no cost of course!) from my website (http://sncf231e.nl/) or directly: http://sncf231e.nl/ciwl-carriages-by-fredsmall/.
Another interesting book (I think) is a book on models of Non-CIWL luxury trains, which includes a couple of British luxury trains, some of them in 00 gauge (and some of these again by Hornby). It can be seen here: http://sncf231e.nl/non-ciwl-luxury-trainssmall-2/
There are more e-books I made on my website; one on models of LNER Pacifics might also be of interest: http://sncf231e.nl/lner-pacifics-and-nyc-hudsons/
Regards
Fred