Here is the finished code if anyone is interested.. really enjoyed finding out about relations in Umbraco...all new to me and pretty powerfull. Even managed to combine the UMB Vimeo video picker into the code. Inspired me to write a blog post about how to do this as there are very few exmaples of how to use relations etc out there.

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE xsl:stylesheet [ <!ENTITY nbsp "&#x00A0;"> ]>
<xsl:stylesheet 
    version="1.0" 
    xmlns:xsl="http://www.w3.org/1999/XSL/Transform" 
    xmlns:msxml="urn:schemas-microsoft-com:xslt"
    xmlns:umbraco.library="urn:umbraco.library" xmlns:Exslt.ExsltCommon="urn:Exslt.ExsltCommon" xmlns:Exslt.ExsltDatesAndTimes="urn:Exslt.ExsltDatesAndTimes" xmlns:Exslt.ExsltMath="urn:Exslt.ExsltMath" xmlns:Exslt.ExsltRegularExpressions="urn:Exslt.ExsltRegularExpressions" xmlns:Exslt.ExsltStrings="urn:Exslt.ExsltStrings" xmlns:Exslt.ExsltSets="urn:Exslt.ExsltSets" xmlns:Examine="urn:Examine" xmlns:tagsLib="urn:tagsLib" xmlns:BlogLibrary="urn:BlogLibrary" xmlns:ucomponents.cms="urn:ucomponents.cms" xmlns:ucomponents.dates="urn:ucomponents.dates" xmlns:ucomponents.email="urn:ucomponents.email" xmlns:ucomponents.io="urn:ucomponents.io" xmlns:ucomponents.media="urn:ucomponents.media" xmlns:ucomponents.members="urn:ucomponents.members" xmlns:ucomponents.nodes="urn:ucomponents.nodes" xmlns:ucomponents.random="urn:ucomponents.random" xmlns:ucomponents.request="urn:ucomponents.request" xmlns:ucomponents.search="urn:ucomponents.search" xmlns:ucomponents.strings="urn:ucomponents.strings" xmlns:ucomponents.urls="urn:ucomponents.urls" xmlns:ucomponents.xml="urn:ucomponents.xml" 
    xmlns:vimeo="urn:vimeo" 
    exclude-result-prefixes="msxml umbraco.library Exslt.ExsltCommon Exslt.ExsltDatesAndTimes Exslt.ExsltMath Exslt.ExsltRegularExpressions Exslt.ExsltStrings Exslt.ExsltSets Examine tagsLib BlogLibrary ucomponents.cms ucomponents.dates ucomponents.email ucomponents.io ucomponents.media ucomponents.members ucomponents.nodes ucomponents.random ucomponents.request ucomponents.search ucomponents.strings ucomponents.urls ucomponents.xml vimeo ">


<xsl:output method="xml" omit-xml-declaration="yes"/>
<xsl:param name="currentPage"/>

<xsl:template match="/">

                <!-- Let's fetch the id's -->
                <xsl:if test="string-length($currentPage/candidates) > 0">  
                  <xsl:variable name="items" select="umbraco.library:Split($currentPage/candidates,',')" />  

                      <xsl:for-each select="$items//value">
                        <xsl:variable name="currentnode" select="umbraco.library:GetXmlNodeById(.)" />
                        <!-- render only published nodes -->
                        <xsl:if test="count($currentnode/error) = 0">

                            <div class="col-md-3 videoPanelSml">
                                 <h3><a href="{umbraco.library:NiceUrl($currentnode/@id)}" ><xsl:value-of select="$currentnode/candidateName" /></a></h3>
                                 <xsl:if test="string-length($currentnode/videoEmbed) &gt; 0"> 
                                    <iframe src="//player.vimeo.com/video/{$currentnode/videoEmbed}" width="250" Height="130" frameborder="0"></iframe>
                                    <xsl:variable name="item" select="vimeo:GetMedia($currentnode/videoEmbed/value/@dataTypeId, $currentnode/videoEmbed/value)" />
                                    <xsl:value-of select="$item/EmbedCode" disable-output-escaping="yes" />
                                 </xsl:if>
                                 <a href="{umbraco.library:NiceUrl($currentnode/@id)}" class="btn btn-xs btn-block" >View details </a>
                            </div>

                        </xsl:if>                       
                      </xsl:for-each>

                </xsl:if>

</xsl:template>


</xsl:stylesheet>

Which gives me the following result. Looking to now extend this to inculude the ability to "like" or "Favourite" a candidate again using relations in some way.