OK, so I've been doing some research into Essential X-Men, and comicbookdb has the listing as reprinting these issues:
Giant-Size X-Men #1 - Second Genesis
Classic X-Men #1 - First Night
Uncanny X-Men #358 - Lost in Space
Now, it is clearly telling us that the backup from Classic #1 is included, but does anyone know if all of the extra pages from Classic #1 are included as well?
Many Thanks,
wolverine