TOW has a legitimate claim to be considered the very first professional British SF magazine. It was preceded in 1934-5 by Scoops (SCO), but that was more a boy's paper than a genuine magazine. The publisher was The World's Work, who also produced the Master Thriller series, a mixed-genre series of anthologies which had some mystery and weird fiction issues. It carried stories by some distinguished American authors, such as Jack Williamson and Clark Ashton Smith, as well as early work by John Beynon (John Wyndham), Arthur C Clarke and Eric Frank Russell.
The quality of the covers was mixed; some of them, such as those by W J Roberts, stand comparison with what was appearing on American magazines at this time; other were decidedly juvenile. The last four, numbers 13 to 16, carried the same, stylised design as a background to a panel advertising the magazine's contents. If you rotate #16 through 90 degress and look closely, you will see text overprinted on the cover which explains the reason for the magazine's demise. It goes as follows:
"Since this edition went to press, we have been obliged - owing to paper shortages and war conditions generally - to discontinue this magazine while the war lasts. No further issue will appear until peace comes when we hope to resume publication as before."
CN95 observes that one of the "war conditions" was the drafting of the editor, Water Gillings, into the war effort. TOW never appeared again, but Gillings did. After the war, he edited "Fantasy, a magazine of Science Fiction" (FAYB) and co-founded Utopian publications, publishers of American Fiction (AFN), one of the rarest and most obscure of all fantasy/weird fiction magazines. Then he went on to edit the first couple of issues of Science Fantasy (SFY)
These scans were very kindly provided by Yutaka Morita from his own collection.