How to tap off a 15mm compression to 1/2?

[John FoD]

While I am a trained engineer I appear blind when it comes to plumbing fittings. I want to tee off the 15mm compression (copper pipe to flex hose) to loo so as to supply a cold water bidet. The bidet is suppplied via a 1/2 connection. So appears simple, a tee but cannot find - any suggestions would be appreciated.

 

[ShaunCorbs]

Is it wras approved ?

 

[Devisham]

1/2"Mx15mm or 1/2"Fx15mm compression adaptor? Or you can get 15mmx1/2"Fx15mm equal tees?