I had to remove the gallery causing the issue as it was getting unamanagebable. Problem is that removing it has 'broken' 2 slideshows on the page and I can work out why.
If you visit http://www.rallyforheroes.com/what-is-rfh.php you will see a page with the gallery right at the bottom (albeit unstyled). ON this page, the main background image is a slideshow as is the bottom panel (sponsors) of the left hand column
But if you go to http://www.rallyforheroes.com/drivers.php where the gallery has been removed, the background & sponsor slideshows no longer work...
Thanks for your help