<?php
//error_reporting(E_ALL);
//ini_set('display_errors', 1);
//$rafeedurl ="http://www.ramblers.org.uk/api/lbs/walks?groups=hf51";

$options = new RJsonwalksFeedoptions('hf51,hf52');
$feed=new RJsonwalksFeed($options);

//$feed=new RJsonwalksFeed($rafeedurl); // standard software to read json feed and decode file

$display= new RJsonwalksStdCancelledwalks(); // code to display the walks in a particular format

$feed->Display($display);  // display walks information

?>

This option displays the lines above! These are probably blank.

This is because this option ONLY displays a list of walks that have been cancelled.