Doctor Who: Classic Omnibus Volume 2 features a collection of comics that were originally presented in Doctor Who Magazine during the 80s, featuring the last adventures of the Fourth Doctor, and the continuing adventures of the Fifth and Sixth Doctors. Doctor Who Magazine apparently was allowed to only license the Doctors, not the companions, so for these adventures (and other adventures out there) Doctor Who Magazine created new companions for the Doctors, like Sir Justin, Frobisher, and Max. An interesting thing to note--these adventures were also previously collected in larger format editions published by Panini Comics, and those books (based on ones I have read in the past) usually featured commentary of some kind from the writers and artists on the creation of these comics. That might have been interesting to read in the omnibus collection.
However, the Panini Comics books seem to be out of print, though you can pick up a couple of new and used books from independent sellers. I probably should have purchased Panini, but then again, I would have had to purchase possibly three of the Panini Comics books to get the same comic strips that are presented in this omnibus edition. (In essence, I would have had to pay more for the Panini strips in shorter-length volumes.) And even though the omnibus edition seems a little cramped, with shorter height (not length), they are at least in full color--apparently, from what I have heard, Doctor Who Magazine did not publish their original comic strips in color until the era of the Eighth Doctor, and it's quite likely that the Panini books would have been in black and white. (The Glorious Dead was in black and white.)
So, you are left with a sort of conundrum--black and white, yet larger format (like a regular comic book) with commentary from writers/artists from Panini, or the slightly cheaper/larger in length omnibus version that does have colorized strips? You decide.