You're really struggling here aren't you. Am I going to have to give you an English lesson?
It is "The Official OCUK Lego Thread".
That is different from the OCUK Official Lego Thread.
The placement of the word official is before OCUK therefore it means that this is the Official Overclockers thread, not the official Lego thread.
It's called a modifier.
Let's try another example;
The good dog is here. Vs Good the dog is here.
Same words, two different meanings. In one the dog is good. Who's a good boy? Who is? In the other the dog is called Good.
Word placement changes meanings. Simple.
Good work. So is lepin Lego ? Is it official ? Does it belong in the Lego thread ?