...covering Australian comics
There was probably no separate UK version of this issue (UK printings began from issue 21). It is possible that there are two variants of this edition. One that ends with Peg on the back cover (possible) and one that ends with the final page of 'The Case of the Flying Saucers' on the back cover (confirmed). There also seems to be an edition with black lines for the tent on the front cover and another with green lines.