Hello. Have been looking on the internet for a while now and although haven't managed to find an answer to my question do feel an enormous sense of relief in finding a group of people who between them seem to have an enormous body of knowledge and the willingness to help people like me (electricity newcomer) out. I hope you can help
Have taken down existing light fitting in bathroom and have found 2 cables that seem confusing.

Electrics in bathroom are as follows. One pull switch which turns the one light fitting on and off. When I turn on the light the fan also comes on. There is an isolator switch whcih can be used to turn off the fan whilst the light is still on. When the light is turned off the fan stays on and then turns itself off after about 5 minutes. There is also a shaver socket.

I have drawn a diagram of how the wires are connected in the light fitting and the pull cord switch. See link below.

http://putfile.com/pic.php?pic=6/16915564337.jpg&s=x4

I have been given two suggestions as to how to fix this. Either put in tc&e cable between pullcord and light. However I do not have access to the void where the cable runs.

The second suggestion is to wire up as per this diagram.

http://putfile.com/pic.php?pic=6/17015330484.jpg&s=x2

This would lose me the use of the timer in the fan but would give me back an effective earth hence making it safe.

Can anybody see any problems/ dangers with this second approach which is what I intend to do?

Any help you can offer would be really appreciated.

Thanks