Inferno was originally published in MV Features' Secret Service Picture Library #4:
This story was reprinted in the following digest-sized Page Publication issues:
War Stories #4
All three Page Publications issues feature cover art by Keith Chatto. I expect there is an earlier edition which carries a Chatto swipe of the MV Features cover art.
And given the Australian content of this issue, I wouldn't be surprised to find a few more editions of this issue spread over various spy and war titles. The titles above are all war titles, but given the Yaffa stable included spy titles such as Spy Action Library, Spy Adventure Picture Library and Spy Stories Picture Library... well, I'd be placing a bet on those odds.