This book used to be .99 on Amazon. Not anymore. It's also sold in the US and so I don't know if this helps you. But it's a very succinct book on how to write third person deep point of view.
I don't think pov is as straightforward as it sometimes seems. For example, I didn't think that there was first person omniscient. What would be the point of telling a story in first person if the character knows everything? But it seems they don't mean EVERYTHING by everything. By everything when talking about first person omniscient they mean most things, or some things? It's very confusing.
The Great Gatsby is supposed to be first person omniscient. But the narrator doesn't know everything at all. Yet, it's categorized that way. Thinking about it makes my head hurt.
You might be better off going with general guidelines. Tell us what your protagonist thinks and avoid writing 'She thought....' or 'She left....' or any pronoun verb type of construction. Sometimes you won't be able to avoid it but a lot of the time, you can cut out the middle man -- so to speak -- and write a sentence that seems to come directly from the protagonist rather than an invisible narrator we never get to know.
At first, it might feel like you're breaking some rules. It might feel like you're assuming some knowledge you don't have because you're not in the head of your protagonist. I believe that's what keeps people from writing in deep third person POV and you might be correct. What you're writing might not be strictly speaking, grammatically correct. But break the rule anyway. Readers want to feel as though they know the main character intimately.
And last in what appears to have become a barrage of advice, look at good examples of third person POV. The mistress of POV is Nora Roberts. I could be wrong but I don't think she writes in anything but third person POV. But you could get out a stack of novels, read some passages, see if you can pinpoint the POV. If it's 3rd person, ask yourself if it's deep 3rd person. If so, what about it makes it deep POV? How would it not be deep -- see if you can reverse engineer it. Take sentences in deep 3rd person POV and write them in 3rd person POV.
I know it sounds like a lot of trouble. But they're only ideas and suggestions.