Approved with the following edits included or clarified
- The Introduction does not seem to spell out that the challenge is distinguishing the fluorescence of methanogens from plant or other material in rumen samples- isn’t that the biggest challenge to overcome ? it just says it can see methanogens – this can be tightened up I think.
- The acknowledgements should include PGGRC if the work goes back into the SSIF contract period prior to August 2021 - if its later and in the RGP period only then they are probably OK. If you mention PGGRC then that might suffice – there is no web presence for the RGP - people looking it up might not find it.