17-05-2012, 12:16 PM
there is a "U" shaped, sprung metal plate that holds it in place by sliding into groves on either side of the barrel, I have pics somewhere if you want me to have a look 
Edit........also found this - <!-- l --><a class="postlink-local" href="http://www.306oc.co.uk/forum/viewtopic.php?f=30&t=1085&hilit=door+lock" onclick="window.open(this.href);return false;">viewtopic.php?f=30&t=1085&hilit=door+lock</a><!-- l -->

Edit........also found this - <!-- l --><a class="postlink-local" href="http://www.306oc.co.uk/forum/viewtopic.php?f=30&t=1085&hilit=door+lock" onclick="window.open(this.href);return false;">viewtopic.php?f=30&t=1085&hilit=door+lock</a><!-- l -->
