A bit of further info;
DOWNLOADING ISSUES
When browsing the app, a Cloud Icon containing a down arrow is displayed in the top toolbar.
Tapping the download icon will prompt you to accept the download.
When browsing an issue, tapping the icon will serve a dialogue box asking if you would like to download the "collection". The collection is all the articles in the issue.
When a collection has been downloaded, the articles in that collection are stored on the device and do not need to be downloaded individually. This makes for a more pleasant reading experience and allows the content to be read offline. Although some elements in the HTML view of articles may require an internet connection to load.
To delete a downloaded collection from your device, browse into the collection and tap the download icon in the toolbar again. The state of the icon changes when the collection has been downloaded. Please note there is no top down way to manage downloading and deletion of downloaded content.