Zafira Club 1.6 EGR Valve Removal

Hi,
Please forgive me if it is a new thread for the same EGR valve issue.
I have a 2007 1.6 Zafira Club Petrol and I am seeing Code 17152 System Too Lean (Bank 1) on it.

I also notice it judders on low revs.
Searching through different forums I have found out that it could be dirty EGR Valve or EGR Channels (correct me if I am wrong).

I like to think I have located the EGR valve but I am unable to take it off even after removing all possible screws I can see and feel.

I attach some...

Zafira Club 1.6 EGR Valve Removal