Of course in the UK it would not be legal for you to do work in a bathroom if you are not a 'Competent Person' or have the work signed off by such.
t
March 2008
for an extractor fan you need to take power from your ceiling rose in your bathroom as you need a neutral which your pullswitch doesnt have. text if in any difficulty 07707969604
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix lighting.