Apparently my car has an idle control screw in the throttle body. I didnt think the focus had one tbh but there you go. I was told

With the engine turned off, remove sealant from idle screw aperture on throttle body
Start and warm up engine to operating temperature
Unplug the engine idle valve connector (wire)
Using a 2.5mm Allen key, set engine idle speed to 850 rpm
Stop engine and re-fit idle valve plug
Re-start engine and road test for satisfactory operation
Finely adjust idle speed as necessary

Anyone able to help me as to where the idle screw is located on throttle body?