Nemo cooling system bleed points

[Smithy2503]

Hi,
I'm trying to locate the bleed valves on the cooling system of my 2010 Nemo 1.4 Petrol. I don't have a user manual and can only see 1 bleed screw next to the thermostat housing.
Is there another one for the heater matrix somewhere as I can't see one but the system won't bleed properly- there isn't a lot of info on nemo's on the web and most other engine types for citroen have another bleed valve near the bulkhead but mine doesn't seem to?

Any tricks to get the system bled properly would be greatly appreciated!

Thanks