Yes of course, that makes sense - it has nothing to do with the template! Told you I was being thick!
For those of you who may suffer from the same block as I did, here are the steps:
To increase the amount of content items on your frontpage, do the following:
1. Log into the administrator backend
2. In the drop down menus, select Menu > mainmenu*
3. Click the link to your Home page
4. On the right side, increase the number of articles in the "# Intro" field
5. Save - done.
* Select the menu that has the link to Home.
Now wasn't that easy!