Filter Perch Collection with perch_page_attribute

Hi

I'd like to show a subset of the items in a collection on various pages in our site.

Id like to pass the value of page attribute to the perch collection, however this doesn't seem to work. Is there another way I can achieve this?

Here is the code that I'm using in the Master Page Template

<?php
include($_SERVER['DOCUMENT_ROOT'].'/includes/page_header.php'); 

$TourFilter = perch_page_attribute('filter', true);

perch_content('Page Body');

perch_collection('Tours',array(
  'template' => 'tours_page_destination.html',
  'filter'=>'destination',
    'match'=>'eq',
    'value'=> $TourFilter,
    'sort' => 'destinationsort_australia',
  'sort-order' => 'ASC',
  'count' => 99
  ));
    ?>

  <?php

include($_SERVER['DOCUMENT_ROOT'].'/includes/page_footer.php');
?>

At the moment, the perch_page_attribute is outputted to the page only. I've referred to https://docs.grabaperch.com/functions/page-attributes/perch-page-attribute/ but must be doing something wrong.

Am running latest version of Runway

Many thanks

Regards James