Anyone recognise this tap stop valve??

Gobsh

Anyone recognise this tap stop valve??

I need to replace the inserts, looked to turn off the valves and see these weird things?

There's about 6 simple blue/red taps under the sink for dishwasher outside tap etc but fit since reason the actual sink taps have these??

Do I turn off the butterflies or the square nut?

Rodders53

https://www.bes.co.uk/flow-regulator-ball-valve-cp961-15mm-17527/

The sticky-out flat side (for spanner) with screwdriver slot in top will open/close the ball valve. 
The other slotted cover plate accesses a flow regulator cartridge that may, or may not, be fitted.

(Download the pdf file for future reference of the part).

Gobsh

Cool thanks 👍