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>
    <allpages>
      <p pageid="424" ns="0" title="Babylon Recall - A Blakes Seven adventure" />
      <p pageid="42199" ns="0" title="Back When I Landed In London From Kingston With Nothing Much. The Air Was Sharp" />
      <p pageid="42202" ns="0" title="Back When I Landed In London From The Caribbean With Just A Suitcase. The Air Was Sharp" />
      <p pageid="1059" ns="0" title="Bad Ideas" />
      <p pageid="42268" ns="0" title="Bankruptcy Attorney - Becoming One" />
      <p pageid="902" ns="0" title="Basics Of Home Buying In Today s Economy" />
      <p pageid="42294" ns="0" title="Bespoke Furniture London: Built To Fit Real Homes" />
      <p pageid="42246" ns="0" title="Bespoke Furniture London: The Secret To A Perfect London Home" />
      <p pageid="1111" ns="0" title="Best 6 Tips For Voice OverWe Needed To Attract Consideration To Voice Over.So Did You." />
      <p pageid="42169" ns="0" title="Best Bug Zapper Bulbs In The UK" />
    </allpages>
  </query>
  <query-continue>
    <allpages apcontinue="Best_Bug_Zapper_For_Mosquitoes" />
  </query-continue>
</api>