Cupboard under stairs lighting

[Brns]

Hi

I'm looking to fit a light in the cupboard under my stairs, there is a single socket on the wall next to the cupboard door in the hallway with the wires clipped on the inside.
Not certain yet if this is a spur or on the normal ring circuit but if it's a spur then could I possibly fit a 13a fcu (switched) then wire some 1.5mm cable to a ceiling rose for the light, switched fcu acting as the main switch for the light?

 

[Midwest]

Yes, I do know how to do safe isolation, yes I do know how to do a ring final circuit test with the figure off 8 connection between live & neautral but I'm sorry for not writing down every little detail step by step of what I'm doing, I've got much better things to do that's why all I wanted was a simple answer & I'm sorry my mistake not a multimeter I meant a Kewtech KT63 multifunction tester and next time I will put every detail step by step off it all & even let you know what I'm having for dinner if you like

Easy Tiger. Don't think anyone will be predisposed to help, if you lose your temper

 

[Pete999]

I'm done

 

[DPG]

Oh dear, you started off so well but then started showing the attitude. You will find you don't get much assistance if you deal with things in this manner. Chill out - you seem to make out you know everything but then have a very basic query, which is why people probably assumed your lack of knowledge and ability. Daz