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"?>
    <alllinks galcontinue="Blackpool_Road|3471" />
      <page pageid="1" ns="0" title="Main Page" />
      <page pageid="1564" ns="0" title="Historic Peckham" />
      <page pageid="1570" ns="0" title="Visions for Peckham" />
      <page pageid="1912" ns="6" title="File:Benedict O&#039;Looney - CCQ.jpg" />
      <page pageid="2004" ns="0" title="Planning applications, Planning enforcement cases, Licensing applications" />
      <page pageid="2008" ns="0" title="BRG" />
      <page pageid="2019" ns="0" title="SRUG initial framework" />
      <page pageid="2123" ns="0" title="Peckham Town Centre Forum/meetings" />
      <page pageid="2426" ns="0" title="Inter faith" />
      <page pageid="2727" ns="0" title="Planning" />