You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query-continue>
    <allimages aifrom="Breathing.jpg" />
  </query-continue>
  <query>
    <allimages>
      <img name="BORT.jpg" timestamp="2014-11-03T15:35:16Z" url="https://evolutionhealthcaresystems.co.uk/help/images/f/f5/BORT.jpg" descriptionurl="https://evolutionhealthcaresystems.co.uk/help/index.php/File:BORT.jpg" ns="6" title="File:BORT.jpg" />
      <img name="BcAuthor_login_screen.png" timestamp="2014-08-29T15:57:27Z" url="https://evolutionhealthcaresystems.co.uk/help/images/5/58/BcAuthor_login_screen.png" descriptionurl="https://evolutionhealthcaresystems.co.uk/help/index.php/File:BcAuthor_login_screen.png" ns="6" title="File:BcAuthor login screen.png" />
      <img name="Bibid_data_transfer.png" timestamp="2012-09-25T10:34:31Z" url="https://evolutionhealthcaresystems.co.uk/help/images/7/7d/Bibid_data_transfer.png" descriptionurl="https://evolutionhealthcaresystems.co.uk/help/index.php/File:Bibid_data_transfer.png" ns="6" title="File:Bibid data transfer.png" />
      <img name="Bibid_import_complete.png" timestamp="2012-05-28T10:05:05Z" url="https://evolutionhealthcaresystems.co.uk/help/images/1/1c/Bibid_import_complete.png" descriptionurl="https://evolutionhealthcaresystems.co.uk/help/index.php/File:Bibid_import_complete.png" ns="6" title="File:Bibid import complete.png" />
      <img name="Bibid_import_dashboard.png" timestamp="2012-05-28T09:50:12Z" url="https://evolutionhealthcaresystems.co.uk/help/images/e/e0/Bibid_import_dashboard.png" descriptionurl="https://evolutionhealthcaresystems.co.uk/help/index.php/File:Bibid_import_dashboard.png" ns="6" title="File:Bibid import dashboard.png" />
      <img name="Bibid_import_login.png" timestamp="2012-05-28T09:50:36Z" url="https://evolutionhealthcaresystems.co.uk/help/images/9/94/Bibid_import_login.png" descriptionurl="https://evolutionhealthcaresystems.co.uk/help/index.php/File:Bibid_import_login.png" ns="6" title="File:Bibid import login.png" />
      <img name="Bibid_import_start.png" timestamp="2012-05-28T09:59:33Z" url="https://evolutionhealthcaresystems.co.uk/help/images/e/eb/Bibid_import_start.png" descriptionurl="https://evolutionhealthcaresystems.co.uk/help/index.php/File:Bibid_import_start.png" ns="6" title="File:Bibid import start.png" />
      <img name="Blank_Folder.jpg" timestamp="2014-09-15T14:55:54Z" url="https://evolutionhealthcaresystems.co.uk/help/images/9/93/Blank_Folder.jpg" descriptionurl="https://evolutionhealthcaresystems.co.uk/help/index.php/File:Blank_Folder.jpg" ns="6" title="File:Blank Folder.jpg" />
      <img name="Blank_flexiviews.png" timestamp="2018-03-13T10:44:20Z" url="https://evolutionhealthcaresystems.co.uk/help/images/e/e4/Blank_flexiviews.png" descriptionurl="https://evolutionhealthcaresystems.co.uk/help/index.php/File:Blank_flexiviews.png" ns="6" title="File:Blank flexiviews.png" />
      <img name="BookmarkButton.jpg" timestamp="2017-01-25T11:10:51Z" url="https://evolutionhealthcaresystems.co.uk/help/images/d/dd/BookmarkButton.jpg" descriptionurl="https://evolutionhealthcaresystems.co.uk/help/index.php/File:BookmarkButton.jpg" ns="6" title="File:BookmarkButton.jpg" />
    </allimages>
  </query>
</api>