Thought I would take some pics to make it easier for other people to do this simple cleaning task, I have little or no skills with the spanner, so this truly is something anyone can do with the minimal of hassle. I had one crack at this and did a pretty poor job, then got some proper guidance from this handy YouTube vid I found, albeit on a completely different vehicle, the principle is identical. http://www.youtube.com/watch?v=JYPSjktvj-o
Purchase throttle body cleaner (Halfords and other car places sell this)
Get a toothbrush you don't need to use again (for scrubbing inside throttle body).
Screwdriver (for releasing plastic clips)
Long nose pliers (for releasing plastic clips)
A cloth / strong paper towels (for mopping residual liquid).
Ensure the engine is cool, open bonnet and loosen the plastic clip with a screwdriver / pliers as needed.
Lift the plastic inlet out of the way (I found there was enough "slack" in the connections to do this, if not you'll need to remove the similar clips on the "Y" section to get it further out of the way
Spray the thottle flap liberally with the cleaner and wipe down / brush and remove residual. Then pushing the top of the flap with a finger, opening it - then again liberally spray cleaner below and above open flap. The use the toothbrush to clean all around the inside of the throttle body. I then wiped around to remove the residual liquid from the spray. Leave it to dry out for 10 minutes or so (I used my screwdrivers plastic handle to keep the throttle flap open while it dried). Looks nice and shiny afterwards
Replace the plastic ducting, ensuring it's pushed back firmly and well fastened. Count back all your tools and bits to ensure you haven't left anything to cause engine damage.
I idled the engine for a few minutes to ensure any residual cleaner was burnt off before driving.
If anyone spots any glaring errors with this, please let me know!