I'm replacing the extractor fan in my bathroom. The previous fan had it's own pull cord, the new fan is a timer model I want to run off the light.

The old fan was running from a spur off a power socket ring main via a FCU.
The bathroom light is running from a spur off the lighting ring.

The plan was to take the FCU off the ring main, and then connect the FCU via the light - and onto the fan.

I assume I have to take the FCU off the ring main, otherwise there will be 2 rings connected to the same FCU.
Can I run the light and fan off the same lighting spur?

Thanks

The Electrical Work/ammendments you are describing is notifable under part P and therefore should be under taken by a registered electrician.

Bearing in mind, RCD protection, Requirement for 3 pole isolation switch etc...