Marvel UK was an imprint of Marvel Comics formed in 1972 to reprint US produced stories for the British weekly comic market. Marvel UK later did produce original material by British creators such as Alan Moore, John Wagner, Dave Gibbons, Steve Dillon, and Grant Morrison.
Starting with The Mighty World of Marvel (commonly shortened to MWOM), Marvel UK started with black-and-white (though early issues of MWOM did feature some colour) reprints of The Hulk, Spider-Man, and the Fantastic Four. MWOM proved to be a huge success, and a few months later Spider-Man Comics Weekly was released. Again this carried on reprinted American Spider-Man material originally started in MWOM,with the adventures of Thor starting as a back-up feature.
Many more titles followed as Marvel UK expanded and I list below my favourites. In 1972 I decided that Marvel were okay though I started as a DC fan!