Bent adaptor for tight basin waste

[Chalked]

Hi all
Have used one of these fittings before , but don't know what to call them.

its a bent fitting that is used on a basin waste instead of connecting the trap to the slotted waste. It replaces the back nut, and then takes the wast to the rear of the unit ( like a space saver sink kit)
the vanity unit I am fitting needs it to be as tight as possible. A hepVo trap won't do unfortunately.

thanks in advance.

 

[Roger Welton]

BES item 15499 ?

 

[Chalked]

BES item 15499 ?

Thanks. That might work, have fitted one in the past which replaces the bottom section of a pop up waste fitting.