Adding an additional light to an existing circuit

[pumpkinbreath]

Hi

I want to add a single ceiling rose that is controlled by its own switch onto an existing lighting circuit. Ive drawn up a wiring diagram of how I think it should be done, can anyone please clarify whether its fine or do I need to go back to the drawing board!

Thanks

 

[i=p/u]

can anyone tell me how i make my file smaller, as the limit is 195kb