Wordpress - Show metabox on a specific page only

[admin]

Developing a wordpress plugin where I create a page via the index.php file, this page also uses a custom template that required the user to edit information in a meta box.

I've added metaboxes before to plugins but never been in this situation - how can I specify the meta-box to only show on this one page?

Would be open to all suggestions - I'm sure it's something simple!

Thanks,
Allan