How do I remove the Fan from the back of my dryer?

Hi, I am trying to remove the fan from the back of my dryer so that I can get into the condenser pipe and clear all the fluff. Does anyone know how to remove it. I have taken out the central bolt but its still stuck fast.

This is the fan that I'm trying to remove:
http://shop.ukwhitegoods.co.uk/Tumble+Dryer+Parts/White+Knight/White+Knight+Fans/421307756182+Tumble+Dryer+Fan.html

Thanks

Nigel