The authors have comprehensively and convincingly replied to all reviewer comments and provided a much improved revised manuscript. There are only 2 minor revisions required. These relate to clarifications of the two revisions inserted at lines 278-281 and 285-287 respectively. I cannot quite understand either sentence.

Does the first sentence mean: "A single oxidation step would be unable to sufficiently reduce carbon number for the oxidation products of POA and IVOC to be one order of magnitude higher in volatility"? (noting that a reduction in carbon number increases the volatility)

and the sentence second mean: "To account for the insufficient reduction in carbon number of the IVOC product, reduction in SOA mass yields from IVOC are assumed..."?

Once the clarifications are made (and changes to the wording of these sentences to reflect this clarification), the manuscript is ready for publication. Well done to all co-authors.

Many thanks for the final clarifications. The manuscript is ready to be published.