Radiator Removal Astra H 1.9 Automatic Turbo Diesel

I have an Aussie spec Astra H Automatic 1.9 Diesel with large intercooler (same width as radiator) and Aircon. Different from the smaller ones I have seen on 1.3 Astras.

I have no idea how to remove the Automatic cooler lines. There is approx. 25mm nut (this is also on the new radiator) and a plastic disk.

How do I remove the automatic cooler lines?

Do need to pry the plastic rings off?

What size spanner?

Do I need a special tool?

I have only seen removals done on manual cars.

Any help would be appreciated

Thanks

 

I found a GM video - not Astra but looks the same setup.
The plastic ring comes off and covers a C Clip.
Remove the Clip and the lines pull off.

I will try tomorrow and update if different