Thanks guys, brilliant. Also, can you tell me where my diagnostic plug is?? (Sorry, only had the car a week and haven't had chance to get a Haynes yet).
Lastly, it may be useful to add that in the past when I've done the DIY method of fault reading, i use some solder, it's more flexible than a paperclip and highly conductive so more likely to get a good contact and accurate reading.
Thanks again and location of plug would be much appreciated!