In Auxiliaries^x, Determiners^x, Prepositions^x

I answered this question i just need someone check my answer and tell me if there a mistake and what is the correction of it. What types of phrase have been underlined? Analyse the phrases and give information about what elements they contain and what sort of words they consist of. ...

Yes, it is possible for a noun phrase to have two heads, or more. If "NHS" mrefers to both the clinics and the centres (not just to the clinics) then the head is, as you said, "clinics and centres". I don't know in which way you are asked to go about syntactic analysis. What I would do,...