Hi Keith,
I am in the same boat as you at the moment, looking to get into the ops/dispatch side of the industry. I have just started a distance learning course with Avtech2000.co.uk who cover Aviation Foundation, Operations, Dispatch, Economics & Manangement. I have to say I am really enjoying it so far and it leards to City and Guilds qualifications. Like you I'm just trying this to get a foot in the door.
Good luck!